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Finding the Fourth Proportional to 492,085.90, 738,128.85 and 448,540.30

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Solution

The fourth proportional to 492,085.90, 738,128.85 and 448,540.30 is: 672,810.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,085.90 : 738,128.85 = 448,540.30 : x
  2. Step 2: Convert to fraction form
    492,085.90/738,128.85 = 448,540.30/x
  3. Step 3: Cross multiply
    492,085.90x = 738,128.85 × 448,540.30
  4. Step 4: Simplify right side
    492,085.90x = 331,080,535,817.66
  5. Step 5: Solve for x
    x = 331,080,535,817.66/492,085.90
  6. Step 6: Final answer
    x = 672,810.45

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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.