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Finding the Fourth Proportional to 774.64, 1,156.73 and 770.08

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Solution

The fourth proportional to 774.64, 1,156.73 and 770.08 is: 1,149.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.64 : 1,156.73 = 770.08 : x
  2. Step 2: Convert to fraction form
    774.64/1,156.73 = 770.08/x
  3. Step 3: Cross multiply
    774.64x = 1,156.73 × 770.08
  4. Step 4: Simplify right side
    774.64x = 890,774.64
  5. Step 5: Solve for x
    x = 890,774.64/774.64
  6. Step 6: Final answer
    x = 1,149.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.