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Finding the Fourth Proportional to 487,359.64, 731,039.46 and 321,108.76

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Solution

The fourth proportional to 487,359.64, 731,039.46 and 321,108.76 is: 481,663.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,359.64 : 731,039.46 = 321,108.76 : x
  2. Step 2: Convert to fraction form
    487,359.64/731,039.46 = 321,108.76/x
  3. Step 3: Cross multiply
    487,359.64x = 731,039.46 × 321,108.76
  4. Step 4: Simplify right side
    487,359.64x = 234,743,174,511.67
  5. Step 5: Solve for x
    x = 234,743,174,511.67/487,359.64
  6. Step 6: Final answer
    x = 481,663.14

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Similar ratio
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1.5x scale

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.