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Finding the Fourth Proportional to 659,613.80, 989,420.70 and 210,331.10

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Solution

The fourth proportional to 659,613.80, 989,420.70 and 210,331.10 is: 315,496.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,613.80 : 989,420.70 = 210,331.10 : x
  2. Step 2: Convert to fraction form
    659,613.80/989,420.70 = 210,331.10/x
  3. Step 3: Cross multiply
    659,613.80x = 989,420.70 × 210,331.10
  4. Step 4: Simplify right side
    659,613.80x = 208,105,944,193.77
  5. Step 5: Solve for x
    x = 208,105,944,193.77/659,613.80
  6. Step 6: Final answer
    x = 315,496.65

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.