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Finding the Fourth Proportional to 214,432.40, 321,648.60 and 89,862.80

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Solution

The fourth proportional to 214,432.40, 321,648.60 and 89,862.80 is: 134,794.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,432.40 : 321,648.60 = 89,862.80 : x
  2. Step 2: Convert to fraction form
    214,432.40/321,648.60 = 89,862.80/x
  3. Step 3: Cross multiply
    214,432.40x = 321,648.60 × 89,862.80
  4. Step 4: Simplify right side
    214,432.40x = 28,904,243,812.08
  5. Step 5: Solve for x
    x = 28,904,243,812.08/214,432.40
  6. Step 6: Final answer
    x = 134,794.20

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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.