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Finding the Fourth Proportional to 951.48, 1,426.50 and 518.40

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Solution

The fourth proportional to 951.48, 1,426.50 and 518.40 is: 777.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.48 : 1,426.50 = 518.40 : x
  2. Step 2: Convert to fraction form
    951.48/1,426.50 = 518.40/x
  3. Step 3: Cross multiply
    951.48x = 1,426.50 × 518.40
  4. Step 4: Simplify right side
    951.48x = 739,497.60
  5. Step 5: Solve for x
    x = 739,497.60/951.48
  6. Step 6: Final answer
    x = 777.21

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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.