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Finding the Fourth Proportional to 257,775.64, 386,680.74 and 89,312.92

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Solution

The fourth proportional to 257,775.64, 386,680.74 and 89,312.92 is: 133,975.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,775.64 : 386,680.74 = 89,312.92 : x
  2. Step 2: Convert to fraction form
    257,775.64/386,680.74 = 89,312.92/x
  3. Step 3: Cross multiply
    257,775.64x = 386,680.74 × 89,312.92
  4. Step 4: Simplify right side
    257,775.64x = 34,535,585,997.16
  5. Step 5: Solve for x
    x = 34,535,585,997.16/257,775.64
  6. Step 6: Final answer
    x = 133,975.37

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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.