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Finding the Fourth Proportional to 485.90, 732.52 and 454.58

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Solution

The fourth proportional to 485.90, 732.52 and 454.58 is: 685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.90 : 732.52 = 454.58 : x
  2. Step 2: Convert to fraction form
    485.90/732.52 = 454.58/x
  3. Step 3: Cross multiply
    485.90x = 732.52 × 454.58
  4. Step 4: Simplify right side
    485.90x = 332,989.07
  5. Step 5: Solve for x
    x = 332,989.07/485.90
  6. Step 6: Final answer
    x = 685.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.