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Finding the Fourth Proportional to 814,792, 1,222,221.12 and 388,108.48

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Solution

The fourth proportional to 814,792, 1,222,221.12 and 388,108.48 is: 582,178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,792 : 1,222,221.12 = 388,108.48 : x
  2. Step 2: Convert to fraction form
    814,792/1,222,221.12 = 388,108.48/x
  3. Step 3: Cross multiply
    814,792x = 1,222,221.12 × 388,108.48
  4. Step 4: Simplify right side
    814,792x = 474,354,381,107.10
  5. Step 5: Solve for x
    x = 474,354,381,107.10/814,792
  6. Step 6: Final answer
    x = 582,178.50

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1.5x scale

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.