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Finding the Fourth Proportional to 1,347.50, 1,859.64 and 758.09

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Solution

The fourth proportional to 1,347.50, 1,859.64 and 758.09 is: 1,046.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.50 : 1,859.64 = 758.09 : x
  2. Step 2: Convert to fraction form
    1,347.50/1,859.64 = 758.09/x
  3. Step 3: Cross multiply
    1,347.50x = 1,859.64 × 758.09
  4. Step 4: Simplify right side
    1,347.50x = 1,409,774.49
  5. Step 5: Solve for x
    x = 1,409,774.49/1,347.50
  6. Step 6: Final answer
    x = 1,046.21

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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.