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Finding the Fourth Proportional to 280,019.47, 386,412.87 and 159,144.79

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Solution

The fourth proportional to 280,019.47, 386,412.87 and 159,144.79 is: 219,611.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,019.47 : 386,412.87 = 159,144.79 : x
  2. Step 2: Convert to fraction form
    280,019.47/386,412.87 = 159,144.79/x
  3. Step 3: Cross multiply
    280,019.47x = 386,412.87 × 159,144.79
  4. Step 4: Simplify right side
    280,019.47x = 61,495,595,049.45
  5. Step 5: Solve for x
    x = 61,495,595,049.45/280,019.47
  6. Step 6: Final answer
    x = 219,611.85

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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.