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Finding the Fourth Proportional to 483.12, 724.72 and 288.40

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Solution

The fourth proportional to 483.12, 724.72 and 288.40 is: 432.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.12 : 724.72 = 288.40 : x
  2. Step 2: Convert to fraction form
    483.12/724.72 = 288.40/x
  3. Step 3: Cross multiply
    483.12x = 724.72 × 288.40
  4. Step 4: Simplify right side
    483.12x = 209,009.25
  5. Step 5: Solve for x
    x = 209,009.25/483.12
  6. Step 6: Final answer
    x = 432.62

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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.