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Finding the Fourth Proportional to 1,262.67, 1,742.47 and 703.18

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Solution

The fourth proportional to 1,262.67, 1,742.47 and 703.18 is: 970.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.67 : 1,742.47 = 703.18 : x
  2. Step 2: Convert to fraction form
    1,262.67/1,742.47 = 703.18/x
  3. Step 3: Cross multiply
    1,262.67x = 1,742.47 × 703.18
  4. Step 4: Simplify right side
    1,262.67x = 1,225,261.34
  5. Step 5: Solve for x
    x = 1,225,261.34/1,262.67
  6. Step 6: Final answer
    x = 970.37

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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.