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Finding the Fourth Proportional to 1,256.59, 1,734 and 697.01

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Solution

The fourth proportional to 1,256.59, 1,734 and 697.01 is: 961.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.59 : 1,734 = 697.01 : x
  2. Step 2: Convert to fraction form
    1,256.59/1,734 = 697.01/x
  3. Step 3: Cross multiply
    1,256.59x = 1,734 × 697.01
  4. Step 4: Simplify right side
    1,256.59x = 1,208,615.34
  5. Step 5: Solve for x
    x = 1,208,615.34/1,256.59
  6. Step 6: Final answer
    x = 961.82

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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.