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Finding the Fourth Proportional to 1,347.06, 1,858.95 and 757.61

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Solution

The fourth proportional to 1,347.06, 1,858.95 and 757.61 is: 1,045.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.06 : 1,858.95 = 757.61 : x
  2. Step 2: Convert to fraction form
    1,347.06/1,858.95 = 757.61/x
  3. Step 3: Cross multiply
    1,347.06x = 1,858.95 × 757.61
  4. Step 4: Simplify right side
    1,347.06x = 1,408,349.81
  5. Step 5: Solve for x
    x = 1,408,349.81/1,347.06
  6. Step 6: Final answer
    x = 1,045.50

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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.