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Finding the Fourth Proportional to 754,142, 1,040,874.54 and 478,321.28

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Solution

The fourth proportional to 754,142, 1,040,874.54 and 478,321.28 is: 660,183.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    754,142 : 1,040,874.54 = 478,321.28 : x
  2. Step 2: Convert to fraction form
    754,142/1,040,874.54 = 478,321.28/x
  3. Step 3: Cross multiply
    754,142x = 1,040,874.54 × 478,321.28
  4. Step 4: Simplify right side
    754,142x = 497,872,442,292.21
  5. Step 5: Solve for x
    x = 497,872,442,292.21/754,142
  6. Step 6: Final answer
    x = 660,183.95

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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.