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Finding the Fourth Proportional to 280,477.20, 420,718.20 and 93,488.70

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Solution

The fourth proportional to 280,477.20, 420,718.20 and 93,488.70 is: 140,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,477.20 : 420,718.20 = 93,488.70 : x
  2. Step 2: Convert to fraction form
    280,477.20/420,718.20 = 93,488.70/x
  3. Step 3: Cross multiply
    280,477.20x = 420,718.20 × 93,488.70
  4. Step 4: Simplify right side
    280,477.20x = 39,332,397,584.34
  5. Step 5: Solve for x
    x = 39,332,397,584.34/280,477.20
  6. Step 6: Final answer
    x = 140,233.85

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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.