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Finding the Fourth Proportional to 257,592.16, 386,499.48 and 139,346.74

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Solution

The fourth proportional to 257,592.16, 386,499.48 and 139,346.74 is: 209,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,592.16 : 386,499.48 = 139,346.74 : x
  2. Step 2: Convert to fraction form
    257,592.16/386,499.48 = 139,346.74/x
  3. Step 3: Cross multiply
    257,592.16x = 386,499.48 × 139,346.74
  4. Step 4: Simplify right side
    257,592.16x = 53,857,442,549.70
  5. Step 5: Solve for x
    x = 53,857,442,549.70/257,592.16
  6. Step 6: Final answer
    x = 209,080.29

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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.