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Finding the Fourth Proportional to 968.02, 1,449.72 and 771.66

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Solution

The fourth proportional to 968.02, 1,449.72 and 771.66 is: 1,155.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.02 : 1,449.72 = 771.66 : x
  2. Step 2: Convert to fraction form
    968.02/1,449.72 = 771.66/x
  3. Step 3: Cross multiply
    968.02x = 1,449.72 × 771.66
  4. Step 4: Simplify right side
    968.02x = 1,118,690.94
  5. Step 5: Solve for x
    x = 1,118,690.94/968.02
  6. Step 6: Final answer
    x = 1,155.65

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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.