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Finding the Fourth Proportional to 458,947.20, 688,420.80 and 412,291.20

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Solution

The fourth proportional to 458,947.20, 688,420.80 and 412,291.20 is: 618,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,947.20 : 688,420.80 = 412,291.20 : x
  2. Step 2: Convert to fraction form
    458,947.20/688,420.80 = 412,291.20/x
  3. Step 3: Cross multiply
    458,947.20x = 688,420.80 × 412,291.20
  4. Step 4: Simplify right side
    458,947.20x = 283,829,837,736.96
  5. Step 5: Solve for x
    x = 283,829,837,736.96/458,947.20
  6. Step 6: Final answer
    x = 618,436.80

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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.