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Finding the Fourth Proportional to 280,357.20, 386,879.42 and 159,487.11

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Solution

The fourth proportional to 280,357.20, 386,879.42 and 159,487.11 is: 220,084.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,357.20 : 386,879.42 = 159,487.11 : x
  2. Step 2: Convert to fraction form
    280,357.20/386,879.42 = 159,487.11/x
  3. Step 3: Cross multiply
    280,357.20x = 386,879.42 × 159,487.11
  4. Step 4: Simplify right side
    280,357.20x = 61,702,281,012.99
  5. Step 5: Solve for x
    x = 61,702,281,012.99/280,357.20
  6. Step 6: Final answer
    x = 220,084.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.