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Finding the Fourth Proportional to 559,839.80, 772,598.76 and 318,132.56

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Solution

The fourth proportional to 559,839.80, 772,598.76 and 318,132.56 is: 439,034.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,839.80 : 772,598.76 = 318,132.56 : x
  2. Step 2: Convert to fraction form
    559,839.80/772,598.76 = 318,132.56/x
  3. Step 3: Cross multiply
    559,839.80x = 772,598.76 × 318,132.56
  4. Step 4: Simplify right side
    559,839.80x = 245,788,822,110.13
  5. Step 5: Solve for x
    x = 245,788,822,110.13/559,839.80
  6. Step 6: Final answer
    x = 439,034.20

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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.