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Finding the Fourth Proportional to 458,672.20, 688,008.30 and 121,712.20

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Solution

The fourth proportional to 458,672.20, 688,008.30 and 121,712.20 is: 182,568.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,672.20 : 688,008.30 = 121,712.20 : x
  2. Step 2: Convert to fraction form
    458,672.20/688,008.30 = 121,712.20/x
  3. Step 3: Cross multiply
    458,672.20x = 688,008.30 × 121,712.20
  4. Step 4: Simplify right side
    458,672.20x = 83,739,003,811.26
  5. Step 5: Solve for x
    x = 83,739,003,811.26/458,672.20
  6. Step 6: Final answer
    x = 182,568.30

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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.