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Finding the Fourth Proportional to 262,420.20, 392,723.10 and 157,314.60

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Solution

The fourth proportional to 262,420.20, 392,723.10 and 157,314.60 is: 235,428.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,420.20 : 392,723.10 = 157,314.60 : x
  2. Step 2: Convert to fraction form
    262,420.20/392,723.10 = 157,314.60/x
  3. Step 3: Cross multiply
    262,420.20x = 392,723.10 × 157,314.60
  4. Step 4: Simplify right side
    262,420.20x = 61,781,077,387.26
  5. Step 5: Solve for x
    x = 61,781,077,387.26/262,420.20
  6. Step 6: Final answer
    x = 235,428.06

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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.