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Finding the Fourth Proportional to 498,777.50, 688,316.60 and 272,423

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Solution

The fourth proportional to 498,777.50, 688,316.60 and 272,423 is: 375,945.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,777.50 : 688,316.60 = 272,423 : x
  2. Step 2: Convert to fraction form
    498,777.50/688,316.60 = 272,423/x
  3. Step 3: Cross multiply
    498,777.50x = 688,316.60 × 272,423
  4. Step 4: Simplify right side
    498,777.50x = 187,513,273,121.80
  5. Step 5: Solve for x
    x = 187,513,273,121.80/498,777.50
  6. Step 6: Final answer
    x = 375,945.73

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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.