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Finding the Fourth Proportional to 579,300.85, 868,151.40 and 418,091.61

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Solution

The fourth proportional to 579,300.85, 868,151.40 and 418,091.61 is: 626,560.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,300.85 : 868,151.40 = 418,091.61 : x
  2. Step 2: Convert to fraction form
    579,300.85/868,151.40 = 418,091.61/x
  3. Step 3: Cross multiply
    579,300.85x = 868,151.40 × 418,091.61
  4. Step 4: Simplify right side
    579,300.85x = 362,966,816,549.75
  5. Step 5: Solve for x
    x = 362,966,816,549.75/579,300.85
  6. Step 6: Final answer
    x = 626,560.13

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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.