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Finding the Fourth Proportional to 554.92, 767.26 and 485.70

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Solution

The fourth proportional to 554.92, 767.26 and 485.70 is: 671.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.92 : 767.26 = 485.70 : x
  2. Step 2: Convert to fraction form
    554.92/767.26 = 485.70/x
  3. Step 3: Cross multiply
    554.92x = 767.26 × 485.70
  4. Step 4: Simplify right side
    554.92x = 372,658.18
  5. Step 5: Solve for x
    x = 372,658.18/554.92
  6. Step 6: Final answer
    x = 671.55

Related Problems

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Double scale
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Similar ratio
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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.