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Finding the Fourth Proportional to 1,257.34, 1,735.03 and 697.79

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Solution

The fourth proportional to 1,257.34, 1,735.03 and 697.79 is: 962.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.34 : 1,735.03 = 697.79 : x
  2. Step 2: Convert to fraction form
    1,257.34/1,735.03 = 697.79/x
  3. Step 3: Cross multiply
    1,257.34x = 1,735.03 × 697.79
  4. Step 4: Simplify right side
    1,257.34x = 1,210,686.58
  5. Step 5: Solve for x
    x = 1,210,686.58/1,257.34
  6. Step 6: Final answer
    x = 962.90

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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.