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Finding the Fourth Proportional to 1,347.76, 1,860 and 758.28

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Solution

The fourth proportional to 1,347.76, 1,860 and 758.28 is: 1,046.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.76 : 1,860 = 758.28 : x
  2. Step 2: Convert to fraction form
    1,347.76/1,860 = 758.28/x
  3. Step 3: Cross multiply
    1,347.76x = 1,860 × 758.28
  4. Step 4: Simplify right side
    1,347.76x = 1,410,400.80
  5. Step 5: Solve for x
    x = 1,410,400.80/1,347.76
  6. Step 6: Final answer
    x = 1,046.48

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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.