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Finding the Fourth Proportional to 607.24, 911.40 and 485.20

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Solution

The fourth proportional to 607.24, 911.40 and 485.20 is: 728.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.24 : 911.40 = 485.20 : x
  2. Step 2: Convert to fraction form
    607.24/911.40 = 485.20/x
  3. Step 3: Cross multiply
    607.24x = 911.40 × 485.20
  4. Step 4: Simplify right side
    607.24x = 442,211.28
  5. Step 5: Solve for x
    x = 442,211.28/607.24
  6. Step 6: Final answer
    x = 728.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.