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Finding the Fourth Proportional to 438,322.60, 657,030.30 and 238,220.20

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Solution

The fourth proportional to 438,322.60, 657,030.30 and 238,220.20 is: 357,083.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,322.60 : 657,030.30 = 238,220.20 : x
  2. Step 2: Convert to fraction form
    438,322.60/657,030.30 = 238,220.20/x
  3. Step 3: Cross multiply
    438,322.60x = 657,030.30 × 238,220.20
  4. Step 4: Simplify right side
    438,322.60x = 156,517,889,472.06
  5. Step 5: Solve for x
    x = 156,517,889,472.06/438,322.60
  6. Step 6: Final answer
    x = 357,083.78

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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.