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Finding the Fourth Proportional to 438,445.04, 657,690.24 and 138,957.44

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Solution

The fourth proportional to 438,445.04, 657,690.24 and 138,957.44 is: 208,443.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,445.04 : 657,690.24 = 138,957.44 : x
  2. Step 2: Convert to fraction form
    438,445.04/657,690.24 = 138,957.44/x
  3. Step 3: Cross multiply
    438,445.04x = 657,690.24 × 138,957.44
  4. Step 4: Simplify right side
    438,445.04x = 91,390,952,063.39
  5. Step 5: Solve for x
    x = 91,390,952,063.39/438,445.04
  6. Step 6: Final answer
    x = 208,443.35

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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.