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Finding the Fourth Proportional to 557.32, 769.62 and 427.18

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Solution

The fourth proportional to 557.32, 769.62 and 427.18 is: 589.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.32 : 769.62 = 427.18 : x
  2. Step 2: Convert to fraction form
    557.32/769.62 = 427.18/x
  3. Step 3: Cross multiply
    557.32x = 769.62 × 427.18
  4. Step 4: Simplify right side
    557.32x = 328,766.27
  5. Step 5: Solve for x
    x = 328,766.27/557.32
  6. Step 6: Final answer
    x = 589.91

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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.