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Finding the Fourth Proportional to 699,343,477.20, 980,514,140.40 and 699,343,477.20

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Solution

The fourth proportional to 699,343,477.20, 980,514,140.40 and 699,343,477.20 is: 980,514,140.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,343,477.20 : 980,514,140.40 = 699,343,477.20 : x
  2. Step 2: Convert to fraction form
    699,343,477.20/980,514,140.40 = 699,343,477.20/x
  3. Step 3: Cross multiply
    699,343,477.20x = 980,514,140.40 × 699,343,477.20
  4. Step 4: Simplify right side
    699,343,477.20x = 685,716,168,391,105,024
  5. Step 5: Solve for x
    x = 685,716,168,391,105,024/699,343,477.20
  6. Step 6: Final answer
    x = 980,514,140.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.