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Finding the Fourth Proportional to 1,761.40, 2,642.28 and 607

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Solution

The fourth proportional to 1,761.40, 2,642.28 and 607 is: 910.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.40 : 2,642.28 = 607 : x
  2. Step 2: Convert to fraction form
    1,761.40/2,642.28 = 607/x
  3. Step 3: Cross multiply
    1,761.40x = 2,642.28 × 607
  4. Step 4: Simplify right side
    1,761.40x = 1,603,863.96
  5. Step 5: Solve for x
    x = 1,603,863.96/1,761.40
  6. Step 6: Final answer
    x = 910.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.