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Finding the Fourth Proportional to 927.42, 1,279.58 and 554.23

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Solution

The fourth proportional to 927.42, 1,279.58 and 554.23 is: 764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.42 : 1,279.58 = 554.23 : x
  2. Step 2: Convert to fraction form
    927.42/1,279.58 = 554.23/x
  3. Step 3: Cross multiply
    927.42x = 1,279.58 × 554.23
  4. Step 4: Simplify right side
    927.42x = 709,181.62
  5. Step 5: Solve for x
    x = 709,181.62/927.42
  6. Step 6: Final answer
    x = 764.68

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Double scale
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1.5x scale

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.