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Finding the Fourth Proportional to 801,423.84, 1,105,978.50 and 438,841.92

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Solution

The fourth proportional to 801,423.84, 1,105,978.50 and 438,841.92 is: 605,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    801,423.84 : 1,105,978.50 = 438,841.92 : x
  2. Step 2: Convert to fraction form
    801,423.84/1,105,978.50 = 438,841.92/x
  3. Step 3: Cross multiply
    801,423.84x = 1,105,978.50 × 438,841.92
  4. Step 4: Simplify right side
    801,423.84x = 485,349,728,418.72
  5. Step 5: Solve for x
    x = 485,349,728,418.72/801,423.84
  6. Step 6: Final answer
    x = 605,609.30

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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.