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Finding the Fourth Proportional to 485.15, 723.87 and 450.74

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Solution

The fourth proportional to 485.15, 723.87 and 450.74 is: 672.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.15 : 723.87 = 450.74 : x
  2. Step 2: Convert to fraction form
    485.15/723.87 = 450.74/x
  3. Step 3: Cross multiply
    485.15x = 723.87 × 450.74
  4. Step 4: Simplify right side
    485.15x = 326,278.29
  5. Step 5: Solve for x
    x = 326,278.29/485.15
  6. Step 6: Final answer
    x = 672.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.