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Finding the Fourth Proportional to 657,143.70, 985,715.55 and 342,215.70

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Solution

The fourth proportional to 657,143.70, 985,715.55 and 342,215.70 is: 513,323.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,143.70 : 985,715.55 = 342,215.70 : x
  2. Step 2: Convert to fraction form
    657,143.70/985,715.55 = 342,215.70/x
  3. Step 3: Cross multiply
    657,143.70x = 985,715.55 × 342,215.70
  4. Step 4: Simplify right side
    657,143.70x = 337,327,336,944.14
  5. Step 5: Solve for x
    x = 337,327,336,944.14/657,143.70
  6. Step 6: Final answer
    x = 513,323.55

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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.