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Finding the Fourth Proportional to 438,655.86, 605,884.86 and 317,605.50

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Solution

The fourth proportional to 438,655.86, 605,884.86 and 317,605.50 is: 438,686.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,655.86 : 605,884.86 = 317,605.50 : x
  2. Step 2: Convert to fraction form
    438,655.86/605,884.86 = 317,605.50/x
  3. Step 3: Cross multiply
    438,655.86x = 605,884.86 × 317,605.50
  4. Step 4: Simplify right side
    438,655.86x = 192,432,363,902.73
  5. Step 5: Solve for x
    x = 192,432,363,902.73/438,655.86
  6. Step 6: Final answer
    x = 438,686.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.