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Finding the Fourth Proportional to 393,127.75, 589,691.63 and 112,645

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Solution

The fourth proportional to 393,127.75, 589,691.63 and 112,645 is: 168,967.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,127.75 : 589,691.63 = 112,645 : x
  2. Step 2: Convert to fraction form
    393,127.75/589,691.63 = 112,645/x
  3. Step 3: Cross multiply
    393,127.75x = 589,691.63 × 112,645
  4. Step 4: Simplify right side
    393,127.75x = 66,425,813,098.13
  5. Step 5: Solve for x
    x = 66,425,813,098.13/393,127.75
  6. Step 6: Final answer
    x = 168,967.50

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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.