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Finding the Fourth Proportional to 458,331.20, 688,015.20 and 247,860.80

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Solution

The fourth proportional to 458,331.20, 688,015.20 and 247,860.80 is: 372,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,331.20 : 688,015.20 = 247,860.80 : x
  2. Step 2: Convert to fraction form
    458,331.20/688,015.20 = 247,860.80/x
  3. Step 3: Cross multiply
    458,331.20x = 688,015.20 × 247,860.80
  4. Step 4: Simplify right side
    458,331.20x = 170,531,997,884.16
  5. Step 5: Solve for x
    x = 170,531,997,884.16/458,331.20
  6. Step 6: Final answer
    x = 372,071.55

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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.