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Finding the Fourth Proportional to 385,143.92, 531,572.08 and 258,041.12

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Solution

The fourth proportional to 385,143.92, 531,572.08 and 258,041.12 is: 356,145.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,143.92 : 531,572.08 = 258,041.12 : x
  2. Step 2: Convert to fraction form
    385,143.92/531,572.08 = 258,041.12/x
  3. Step 3: Cross multiply
    385,143.92x = 531,572.08 × 258,041.12
  4. Step 4: Simplify right side
    385,143.92x = 137,167,454,883.93
  5. Step 5: Solve for x
    x = 137,167,454,883.93/385,143.92
  6. Step 6: Final answer
    x = 356,145.97

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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.