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Finding the Fourth Proportional to 774.68, 1,166.60 and 559.76

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Solution

The fourth proportional to 774.68, 1,166.60 and 559.76 is: 842.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.68 : 1,166.60 = 559.76 : x
  2. Step 2: Convert to fraction form
    774.68/1,166.60 = 559.76/x
  3. Step 3: Cross multiply
    774.68x = 1,166.60 × 559.76
  4. Step 4: Simplify right side
    774.68x = 653,016.02
  5. Step 5: Solve for x
    x = 653,016.02/774.68
  6. Step 6: Final answer
    x = 842.95

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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.