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Finding the Fourth Proportional to 280,474.70, 420,714.45 and 93,486.20

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Solution

The fourth proportional to 280,474.70, 420,714.45 and 93,486.20 is: 140,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,474.70 : 420,714.45 = 93,486.20 : x
  2. Step 2: Convert to fraction form
    280,474.70/420,714.45 = 93,486.20/x
  3. Step 3: Cross multiply
    280,474.70x = 420,714.45 × 93,486.20
  4. Step 4: Simplify right side
    280,474.70x = 39,330,995,215.59
  5. Step 5: Solve for x
    x = 39,330,995,215.59/280,474.70
  6. Step 6: Final answer
    x = 140,230.10

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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.