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Finding the Fourth Proportional to 438,471.49, 657,725.53 and 138,945.44

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Solution

The fourth proportional to 438,471.49, 657,725.53 and 138,945.44 is: 208,423.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,471.49 : 657,725.53 = 138,945.44 : x
  2. Step 2: Convert to fraction form
    438,471.49/657,725.53 = 138,945.44/x
  3. Step 3: Cross multiply
    438,471.49x = 657,725.53 × 138,945.44
  4. Step 4: Simplify right side
    438,471.49x = 91,387,962,817.72
  5. Step 5: Solve for x
    x = 91,387,962,817.72/438,471.49
  6. Step 6: Final answer
    x = 208,423.96

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1.5x scale

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.