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Finding the Fourth Proportional to 911,369.60, 1,367,185.12 and 280,336.64

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Solution

The fourth proportional to 911,369.60, 1,367,185.12 and 280,336.64 is: 420,545.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,369.60 : 1,367,185.12 = 280,336.64 : x
  2. Step 2: Convert to fraction form
    911,369.60/1,367,185.12 = 280,336.64/x
  3. Step 3: Cross multiply
    911,369.60x = 1,367,185.12 × 280,336.64
  4. Step 4: Simplify right side
    911,369.60x = 383,272,082,798.80
  5. Step 5: Solve for x
    x = 383,272,082,798.80/911,369.60
  6. Step 6: Final answer
    x = 420,545.17

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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.