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Finding the Fourth Proportional to 672.63, 928.13 and 423.53

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Solution

The fourth proportional to 672.63, 928.13 and 423.53 is: 584.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.63 : 928.13 = 423.53 : x
  2. Step 2: Convert to fraction form
    672.63/928.13 = 423.53/x
  3. Step 3: Cross multiply
    672.63x = 928.13 × 423.53
  4. Step 4: Simplify right side
    672.63x = 393,084.14
  5. Step 5: Solve for x
    x = 393,084.14/672.63
  6. Step 6: Final answer
    x = 584.40

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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.