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Finding the Fourth Proportional to 560,443.05, 773,428.50 and 318,760.43

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Solution

The fourth proportional to 560,443.05, 773,428.50 and 318,760.43 is: 439,899.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,443.05 : 773,428.50 = 318,760.43 : x
  2. Step 2: Convert to fraction form
    560,443.05/773,428.50 = 318,760.43/x
  3. Step 3: Cross multiply
    560,443.05x = 773,428.50 × 318,760.43
  4. Step 4: Simplify right side
    560,443.05x = 246,538,397,367.11
  5. Step 5: Solve for x
    x = 246,538,397,367.11/560,443.05
  6. Step 6: Final answer
    x = 439,899.11

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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.