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Finding the Fourth Proportional to 1,380.06, 2,069.34 and 557.92

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Solution

The fourth proportional to 1,380.06, 2,069.34 and 557.92 is: 836.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.06 : 2,069.34 = 557.92 : x
  2. Step 2: Convert to fraction form
    1,380.06/2,069.34 = 557.92/x
  3. Step 3: Cross multiply
    1,380.06x = 2,069.34 × 557.92
  4. Step 4: Simplify right side
    1,380.06x = 1,154,526.17
  5. Step 5: Solve for x
    x = 1,154,526.17/1,380.06
  6. Step 6: Final answer
    x = 836.58

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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.