Home / 1,261.20-1,740.56-701.72

Finding the Fourth Proportional to 1,261.20, 1,740.56 and 701.72

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Solution

The fourth proportional to 1,261.20, 1,740.56 and 701.72 is: 968.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.20 : 1,740.56 = 701.72 : x
  2. Step 2: Convert to fraction form
    1,261.20/1,740.56 = 701.72/x
  3. Step 3: Cross multiply
    1,261.20x = 1,740.56 × 701.72
  4. Step 4: Simplify right side
    1,261.20x = 1,221,385.76
  5. Step 5: Solve for x
    x = 1,221,385.76/1,261.20
  6. Step 6: Final answer
    x = 968.43

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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.