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Finding the Fourth Proportional to 257,591.66, 386,498.73 and 139,346.24

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Solution

The fourth proportional to 257,591.66, 386,498.73 and 139,346.24 is: 209,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,591.66 : 386,498.73 = 139,346.24 : x
  2. Step 2: Convert to fraction form
    257,591.66/386,498.73 = 139,346.24/x
  3. Step 3: Cross multiply
    257,591.66x = 386,498.73 × 139,346.24
  4. Step 4: Simplify right side
    257,591.66x = 53,857,144,790.28
  5. Step 5: Solve for x
    x = 53,857,144,790.28/257,591.66
  6. Step 6: Final answer
    x = 209,079.54

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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.