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Finding the Fourth Proportional to 961.08, 1,325.46 and 774.50

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Solution

The fourth proportional to 961.08, 1,325.46 and 774.50 is: 1,068.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.08 : 1,325.46 = 774.50 : x
  2. Step 2: Convert to fraction form
    961.08/1,325.46 = 774.50/x
  3. Step 3: Cross multiply
    961.08x = 1,325.46 × 774.50
  4. Step 4: Simplify right side
    961.08x = 1,026,568.77
  5. Step 5: Solve for x
    x = 1,026,568.77/961.08
  6. Step 6: Final answer
    x = 1,068.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.