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Finding the Fourth Proportional to 667.10, 920.55 and 372.35

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Solution

The fourth proportional to 667.10, 920.55 and 372.35 is: 513.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.10 : 920.55 = 372.35 : x
  2. Step 2: Convert to fraction form
    667.10/920.55 = 372.35/x
  3. Step 3: Cross multiply
    667.10x = 920.55 × 372.35
  4. Step 4: Simplify right side
    667.10x = 342,766.79
  5. Step 5: Solve for x
    x = 342,766.79/667.10
  6. Step 6: Final answer
    x = 513.82

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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.