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Finding the Fourth Proportional to 672.15, 926.96 and 423.39

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Solution

The fourth proportional to 672.15, 926.96 and 423.39 is: 583.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.15 : 926.96 = 423.39 : x
  2. Step 2: Convert to fraction form
    672.15/926.96 = 423.39/x
  3. Step 3: Cross multiply
    672.15x = 926.96 × 423.39
  4. Step 4: Simplify right side
    672.15x = 392,463.48
  5. Step 5: Solve for x
    x = 392,463.48/672.15
  6. Step 6: Final answer
    x = 583.89

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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.