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Finding the Fourth Proportional to 257,077.20, 386,076.60 and 187,035.60

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Solution

The fourth proportional to 257,077.20, 386,076.60 and 187,035.60 is: 280,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,077.20 : 386,076.60 = 187,035.60 : x
  2. Step 2: Convert to fraction form
    257,077.20/386,076.60 = 187,035.60/x
  3. Step 3: Cross multiply
    257,077.20x = 386,076.60 × 187,035.60
  4. Step 4: Simplify right side
    257,077.20x = 72,210,068,526.96
  5. Step 5: Solve for x
    x = 72,210,068,526.96/257,077.20
  6. Step 6: Final answer
    x = 280,888.65

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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.