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Finding the Fourth Proportional to 1,275.36, 1,759.97 and 700.45

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Solution

The fourth proportional to 1,275.36, 1,759.97 and 700.45 is: 966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.36 : 1,759.97 = 700.45 : x
  2. Step 2: Convert to fraction form
    1,275.36/1,759.97 = 700.45/x
  3. Step 3: Cross multiply
    1,275.36x = 1,759.97 × 700.45
  4. Step 4: Simplify right side
    1,275.36x = 1,232,767.48
  5. Step 5: Solve for x
    x = 1,232,767.48/1,275.36
  6. Step 6: Final answer
    x = 966.60

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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.