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Finding the Fourth Proportional to 486,998.70, 730,498.05 and 319,037.10

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Solution

The fourth proportional to 486,998.70, 730,498.05 and 319,037.10 is: 478,555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,998.70 : 730,498.05 = 319,037.10 : x
  2. Step 2: Convert to fraction form
    486,998.70/730,498.05 = 319,037.10/x
  3. Step 3: Cross multiply
    486,998.70x = 730,498.05 × 319,037.10
  4. Step 4: Simplify right side
    486,998.70x = 233,055,979,427.66
  5. Step 5: Solve for x
    x = 233,055,979,427.66/486,998.70
  6. Step 6: Final answer
    x = 478,555.65

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Double scale
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Similar ratio
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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.