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Finding the Fourth Proportional to 777.68, 1,171.13 and 562.76

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Solution

The fourth proportional to 777.68, 1,171.13 and 562.76 is: 847.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.68 : 1,171.13 = 562.76 : x
  2. Step 2: Convert to fraction form
    777.68/1,171.13 = 562.76/x
  3. Step 3: Cross multiply
    777.68x = 1,171.13 × 562.76
  4. Step 4: Simplify right side
    777.68x = 659,065.12
  5. Step 5: Solve for x
    x = 659,065.12/777.68
  6. Step 6: Final answer
    x = 847.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.