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Finding the Fourth Proportional to 720,613.44, 994,507.92 and 418,788

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Solution

The fourth proportional to 720,613.44, 994,507.92 and 418,788 is: 577,963.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,613.44 : 994,507.92 = 418,788 : x
  2. Step 2: Convert to fraction form
    720,613.44/994,507.92 = 418,788/x
  3. Step 3: Cross multiply
    720,613.44x = 994,507.92 × 418,788
  4. Step 4: Simplify right side
    720,613.44x = 416,487,982,800.96
  5. Step 5: Solve for x
    x = 416,487,982,800.96/720,613.44
  6. Step 6: Final answer
    x = 577,963.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.