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Finding the Fourth Proportional to 257,960.90, 386,945.91 and 89,487.18

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Solution

The fourth proportional to 257,960.90, 386,945.91 and 89,487.18 is: 134,232.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,960.90 : 386,945.91 = 89,487.18 : x
  2. Step 2: Convert to fraction form
    257,960.90/386,945.91 = 89,487.18/x
  3. Step 3: Cross multiply
    257,960.90x = 386,945.91 × 89,487.18
  4. Step 4: Simplify right side
    257,960.90x = 34,626,698,298.43
  5. Step 5: Solve for x
    x = 34,626,698,298.43/257,960.90
  6. Step 6: Final answer
    x = 134,232.35

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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.