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Finding the Fourth Proportional to 1,283.68, 1,771.52 and 759.72

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Solution

The fourth proportional to 1,283.68, 1,771.52 and 759.72 is: 1,048.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.68 : 1,771.52 = 759.72 : x
  2. Step 2: Convert to fraction form
    1,283.68/1,771.52 = 759.72/x
  3. Step 3: Cross multiply
    1,283.68x = 1,771.52 × 759.72
  4. Step 4: Simplify right side
    1,283.68x = 1,345,859.17
  5. Step 5: Solve for x
    x = 1,345,859.17/1,283.68
  6. Step 6: Final answer
    x = 1,048.44

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1.5x scale

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.