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Finding the Fourth Proportional to 485.04, 724.03 and 448.90

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Solution

The fourth proportional to 485.04, 724.03 and 448.90 is: 670.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.04 : 724.03 = 448.90 : x
  2. Step 2: Convert to fraction form
    485.04/724.03 = 448.90/x
  3. Step 3: Cross multiply
    485.04x = 724.03 × 448.90
  4. Step 4: Simplify right side
    485.04x = 325,016.66
  5. Step 5: Solve for x
    x = 325,016.66/485.04
  6. Step 6: Final answer
    x = 670.09

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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.