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Finding the Fourth Proportional to 1,347.90, 1,860.22 and 758.58

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Solution

The fourth proportional to 1,347.90, 1,860.22 and 758.58 is: 1,046.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.90 : 1,860.22 = 758.58 : x
  2. Step 2: Convert to fraction form
    1,347.90/1,860.22 = 758.58/x
  3. Step 3: Cross multiply
    1,347.90x = 1,860.22 × 758.58
  4. Step 4: Simplify right side
    1,347.90x = 1,411,125.69
  5. Step 5: Solve for x
    x = 1,411,125.69/1,347.90
  6. Step 6: Final answer
    x = 1,046.91

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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.