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Finding the Fourth Proportional to 280,211.60, 420,440.72 and 147,059.75

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Solution

The fourth proportional to 280,211.60, 420,440.72 and 147,059.75 is: 220,654.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,211.60 : 420,440.72 = 147,059.75 : x
  2. Step 2: Convert to fraction form
    280,211.60/420,440.72 = 147,059.75/x
  3. Step 3: Cross multiply
    280,211.60x = 420,440.72 × 147,059.75
  4. Step 4: Simplify right side
    280,211.60x = 61,829,904,335.52
  5. Step 5: Solve for x
    x = 61,829,904,335.52/280,211.60
  6. Step 6: Final answer
    x = 220,654.34

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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.