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Finding the Fourth Proportional to 499,140, 688,572.36 and 326,982.87

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Solution

The fourth proportional to 499,140, 688,572.36 and 326,982.87 is: 451,078.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,140 : 688,572.36 = 326,982.87 : x
  2. Step 2: Convert to fraction form
    499,140/688,572.36 = 326,982.87/x
  3. Step 3: Cross multiply
    499,140x = 688,572.36 × 326,982.87
  4. Step 4: Simplify right side
    499,140x = 225,151,366,475.47
  5. Step 5: Solve for x
    x = 225,151,366,475.47/499,140
  6. Step 6: Final answer
    x = 451,078.59

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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.