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Finding the Fourth Proportional to 280,380.78, 386,873.71 and 159,515.01

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Solution

The fourth proportional to 280,380.78, 386,873.71 and 159,515.01 is: 220,101.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,380.78 : 386,873.71 = 159,515.01 : x
  2. Step 2: Convert to fraction form
    280,380.78/386,873.71 = 159,515.01/x
  3. Step 3: Cross multiply
    280,380.78x = 386,873.71 × 159,515.01
  4. Step 4: Simplify right side
    280,380.78x = 61,712,162,353.42
  5. Step 5: Solve for x
    x = 61,712,162,353.42/280,380.78
  6. Step 6: Final answer
    x = 220,101.26

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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.