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Finding the Fourth Proportional to 482.70, 724.86 and 266.70

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Solution

The fourth proportional to 482.70, 724.86 and 266.70 is: 400.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.70 : 724.86 = 266.70 : x
  2. Step 2: Convert to fraction form
    482.70/724.86 = 266.70/x
  3. Step 3: Cross multiply
    482.70x = 724.86 × 266.70
  4. Step 4: Simplify right side
    482.70x = 193,320.16
  5. Step 5: Solve for x
    x = 193,320.16/482.70
  6. Step 6: Final answer
    x = 400.50

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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.