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Finding the Fourth Proportional to 438,708.60, 657,609.30 and 238,606.20

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Solution

The fourth proportional to 438,708.60, 657,609.30 and 238,606.20 is: 357,662.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,708.60 : 657,609.30 = 238,606.20 : x
  2. Step 2: Convert to fraction form
    438,708.60/657,609.30 = 238,606.20/x
  3. Step 3: Cross multiply
    438,708.60x = 657,609.30 × 238,606.20
  4. Step 4: Simplify right side
    438,708.60x = 156,909,656,157.66
  5. Step 5: Solve for x
    x = 156,909,656,157.66/438,708.60
  6. Step 6: Final answer
    x = 357,662.59

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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.