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Finding the Fourth Proportional to 438,363.40, 657,059.10 and 172,035.40

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Solution

The fourth proportional to 438,363.40, 657,059.10 and 172,035.40 is: 257,862.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,363.40 : 657,059.10 = 172,035.40 : x
  2. Step 2: Convert to fraction form
    438,363.40/657,059.10 = 172,035.40/x
  3. Step 3: Cross multiply
    438,363.40x = 657,059.10 × 172,035.40
  4. Step 4: Simplify right side
    438,363.40x = 113,037,425,092.14
  5. Step 5: Solve for x
    x = 113,037,425,092.14/438,363.40
  6. Step 6: Final answer
    x = 257,862.37

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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.