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Finding the Fourth Proportional to 771.87, 1,154.06 and 657.66

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Solution

The fourth proportional to 771.87, 1,154.06 and 657.66 is: 983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.87 : 1,154.06 = 657.66 : x
  2. Step 2: Convert to fraction form
    771.87/1,154.06 = 657.66/x
  3. Step 3: Cross multiply
    771.87x = 1,154.06 × 657.66
  4. Step 4: Simplify right side
    771.87x = 758,979.10
  5. Step 5: Solve for x
    x = 758,979.10/771.87
  6. Step 6: Final answer
    x = 983.30

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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.