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Finding the Fourth Proportional to 672.90, 928.67 and 378.24

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Solution

The fourth proportional to 672.90, 928.67 and 378.24 is: 522.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.90 : 928.67 = 378.24 : x
  2. Step 2: Convert to fraction form
    672.90/928.67 = 378.24/x
  3. Step 3: Cross multiply
    672.90x = 928.67 × 378.24
  4. Step 4: Simplify right side
    672.90x = 351,258.25
  5. Step 5: Solve for x
    x = 351,258.25/672.90
  6. Step 6: Final answer
    x = 522.01

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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.