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Finding the Fourth Proportional to 1,261.43, 1,740.79 and 701.92

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Solution

The fourth proportional to 1,261.43, 1,740.79 and 701.92 is: 968.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.43 : 1,740.79 = 701.92 : x
  2. Step 2: Convert to fraction form
    1,261.43/1,740.79 = 701.92/x
  3. Step 3: Cross multiply
    1,261.43x = 1,740.79 × 701.92
  4. Step 4: Simplify right side
    1,261.43x = 1,221,895.32
  5. Step 5: Solve for x
    x = 1,221,895.32/1,261.43
  6. Step 6: Final answer
    x = 968.66

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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.