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Finding the Fourth Proportional to 746,709.40, 1,120,064.10 and 431,781.40

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Solution

The fourth proportional to 746,709.40, 1,120,064.10 and 431,781.40 is: 647,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    746,709.40 : 1,120,064.10 = 431,781.40 : x
  2. Step 2: Convert to fraction form
    746,709.40/1,120,064.10 = 431,781.40/x
  3. Step 3: Cross multiply
    746,709.40x = 1,120,064.10 × 431,781.40
  4. Step 4: Simplify right side
    746,709.40x = 483,622,845,187.74
  5. Step 5: Solve for x
    x = 483,622,845,187.74/746,709.40
  6. Step 6: Final answer
    x = 647,672.10

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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.