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Finding the Fourth Proportional to 487,279.80, 731,610.90 and 300,655.80

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Solution

The fourth proportional to 487,279.80, 731,610.90 and 300,655.80 is: 451,410.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,279.80 : 731,610.90 = 300,655.80 : x
  2. Step 2: Convert to fraction form
    487,279.80/731,610.90 = 300,655.80/x
  3. Step 3: Cross multiply
    487,279.80x = 731,610.90 × 300,655.80
  4. Step 4: Simplify right side
    487,279.80x = 219,963,060,428.22
  5. Step 5: Solve for x
    x = 219,963,060,428.22/487,279.80
  6. Step 6: Final answer
    x = 451,410.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.