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Finding the Fourth Proportional to 966.53, 1,332.95 and 779.96

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Solution

The fourth proportional to 966.53, 1,332.95 and 779.96 is: 1,075.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.53 : 1,332.95 = 779.96 : x
  2. Step 2: Convert to fraction form
    966.53/1,332.95 = 779.96/x
  3. Step 3: Cross multiply
    966.53x = 1,332.95 × 779.96
  4. Step 4: Simplify right side
    966.53x = 1,039,637.12
  5. Step 5: Solve for x
    x = 1,039,637.12/966.53
  6. Step 6: Final answer
    x = 1,075.64

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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.