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Finding the Fourth Proportional to 1,261.05, 1,740.18 and 701.49

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Solution

The fourth proportional to 1,261.05, 1,740.18 and 701.49 is: 968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.05 : 1,740.18 = 701.49 : x
  2. Step 2: Convert to fraction form
    1,261.05/1,740.18 = 701.49/x
  3. Step 3: Cross multiply
    1,261.05x = 1,740.18 × 701.49
  4. Step 4: Simplify right side
    1,261.05x = 1,220,718.87
  5. Step 5: Solve for x
    x = 1,220,718.87/1,261.05
  6. Step 6: Final answer
    x = 968.02

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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.