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Finding the Fourth Proportional to 705.11, 972.59 and 557.69

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Solution

The fourth proportional to 705.11, 972.59 and 557.69 is: 769.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.11 : 972.59 = 557.69 : x
  2. Step 2: Convert to fraction form
    705.11/972.59 = 557.69/x
  3. Step 3: Cross multiply
    705.11x = 972.59 × 557.69
  4. Step 4: Simplify right side
    705.11x = 542,396.07
  5. Step 5: Solve for x
    x = 542,396.07/705.11
  6. Step 6: Final answer
    x = 769.24

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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.