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Finding the Fourth Proportional to 218,280.60, 326,764.80 and 129,488.40

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Solution

The fourth proportional to 218,280.60, 326,764.80 and 129,488.40 is: 193,843.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,280.60 : 326,764.80 = 129,488.40 : x
  2. Step 2: Convert to fraction form
    218,280.60/326,764.80 = 129,488.40/x
  3. Step 3: Cross multiply
    218,280.60x = 326,764.80 × 129,488.40
  4. Step 4: Simplify right side
    218,280.60x = 42,312,251,128.32
  5. Step 5: Solve for x
    x = 42,312,251,128.32/218,280.60
  6. Step 6: Final answer
    x = 193,843.39

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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.