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Finding the Fourth Proportional to 485.65, 724.81 and 452.74

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Solution

The fourth proportional to 485.65, 724.81 and 452.74 is: 675.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.65 : 724.81 = 452.74 : x
  2. Step 2: Convert to fraction form
    485.65/724.81 = 452.74/x
  3. Step 3: Cross multiply
    485.65x = 724.81 × 452.74
  4. Step 4: Simplify right side
    485.65x = 328,147.99
  5. Step 5: Solve for x
    x = 328,147.99/485.65
  6. Step 6: Final answer
    x = 675.68

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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.