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Finding the Fourth Proportional to 458,422.20, 687,633.30 and 290,460.60

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Solution

The fourth proportional to 458,422.20, 687,633.30 and 290,460.60 is: 435,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,422.20 : 687,633.30 = 290,460.60 : x
  2. Step 2: Convert to fraction form
    458,422.20/687,633.30 = 290,460.60/x
  3. Step 3: Cross multiply
    458,422.20x = 687,633.30 × 290,460.60
  4. Step 4: Simplify right side
    458,422.20x = 199,730,380,897.98
  5. Step 5: Solve for x
    x = 199,730,380,897.98/458,422.20
  6. Step 6: Final answer
    x = 435,690.90

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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.