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Finding the Fourth Proportional to 672.96, 928.74 and 378.19

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Solution

The fourth proportional to 672.96, 928.74 and 378.19 is: 521.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.96 : 928.74 = 378.19 : x
  2. Step 2: Convert to fraction form
    672.96/928.74 = 378.19/x
  3. Step 3: Cross multiply
    672.96x = 928.74 × 378.19
  4. Step 4: Simplify right side
    672.96x = 351,240.18
  5. Step 5: Solve for x
    x = 351,240.18/672.96
  6. Step 6: Final answer
    x = 521.93

Related Problems

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Half scale
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Double scale
Find fourth proportional to 673.96, 930.12 and 379.19
Similar ratio
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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.