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Finding the Fourth Proportional to 438,605.40, 657,908.10 and 172,277.40

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Solution

The fourth proportional to 438,605.40, 657,908.10 and 172,277.40 is: 258,416.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,605.40 : 657,908.10 = 172,277.40 : x
  2. Step 2: Convert to fraction form
    438,605.40/657,908.10 = 172,277.40/x
  3. Step 3: Cross multiply
    438,605.40x = 657,908.10 × 172,277.40
  4. Step 4: Simplify right side
    438,605.40x = 113,342,696,906.94
  5. Step 5: Solve for x
    x = 113,342,696,906.94/438,605.40
  6. Step 6: Final answer
    x = 258,416.10

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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.