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Finding the Fourth Proportional to 458,672.40, 688,008.60 and 279,046.80

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Solution

The fourth proportional to 458,672.40, 688,008.60 and 279,046.80 is: 418,570.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,672.40 : 688,008.60 = 279,046.80 : x
  2. Step 2: Convert to fraction form
    458,672.40/688,008.60 = 279,046.80/x
  3. Step 3: Cross multiply
    458,672.40x = 688,008.60 × 279,046.80
  4. Step 4: Simplify right side
    458,672.40x = 191,986,598,202.48
  5. Step 5: Solve for x
    x = 191,986,598,202.48/458,672.40
  6. Step 6: Final answer
    x = 418,570.20

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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.