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Finding the Fourth Proportional to 280,592.60, 420,951.08 and 80,897.40

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Solution

The fourth proportional to 280,592.60, 420,951.08 and 80,897.40 is: 121,364.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,592.60 : 420,951.08 = 80,897.40 : x
  2. Step 2: Convert to fraction form
    280,592.60/420,951.08 = 80,897.40/x
  3. Step 3: Cross multiply
    280,592.60x = 420,951.08 × 80,897.40
  4. Step 4: Simplify right side
    280,592.60x = 34,053,845,794.44
  5. Step 5: Solve for x
    x = 34,053,845,794.44/280,592.60
  6. Step 6: Final answer
    x = 121,364.02

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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.