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Finding the Fourth Proportional to 484,118.43, 668,036.68 and 280,128.75

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Solution

The fourth proportional to 484,118.43, 668,036.68 and 280,128.75 is: 386,550.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,118.43 : 668,036.68 = 280,128.75 : x
  2. Step 2: Convert to fraction form
    484,118.43/668,036.68 = 280,128.75/x
  3. Step 3: Cross multiply
    484,118.43x = 668,036.68 × 280,128.75
  4. Step 4: Simplify right side
    484,118.43x = 187,136,280,122.55
  5. Step 5: Solve for x
    x = 187,136,280,122.55/484,118.43
  6. Step 6: Final answer
    x = 386,550.62

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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.