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Finding the Fourth Proportional to 559,780.71, 772,518.38 and 318,104.43

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Solution

The fourth proportional to 559,780.71, 772,518.38 and 318,104.43 is: 438,996.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,780.71 : 772,518.38 = 318,104.43 : x
  2. Step 2: Convert to fraction form
    559,780.71/772,518.38 = 318,104.43/x
  3. Step 3: Cross multiply
    559,780.71x = 772,518.38 × 318,104.43
  4. Step 4: Simplify right side
    559,780.71x = 245,741,517,343.90
  5. Step 5: Solve for x
    x = 245,741,517,343.90/559,780.71
  6. Step 6: Final answer
    x = 438,996.04

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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.