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Finding the Fourth Proportional to 280,718.60, 421,079.72 and 112,253.11

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Solution

The fourth proportional to 280,718.60, 421,079.72 and 112,253.11 is: 168,380.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,718.60 : 421,079.72 = 112,253.11 : x
  2. Step 2: Convert to fraction form
    280,718.60/421,079.72 = 112,253.11/x
  3. Step 3: Cross multiply
    280,718.60x = 421,079.72 × 112,253.11
  4. Step 4: Simplify right side
    280,718.60x = 47,267,506,513.96
  5. Step 5: Solve for x
    x = 47,267,506,513.96/280,718.60
  6. Step 6: Final answer
    x = 168,380.39

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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.