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Finding the Fourth Proportional to 1,366.89, 2,050.68 and 782.17

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Solution

The fourth proportional to 1,366.89, 2,050.68 and 782.17 is: 1,173.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.89 : 2,050.68 = 782.17 : x
  2. Step 2: Convert to fraction form
    1,366.89/2,050.68 = 782.17/x
  3. Step 3: Cross multiply
    1,366.89x = 2,050.68 × 782.17
  4. Step 4: Simplify right side
    1,366.89x = 1,603,978.18
  5. Step 5: Solve for x
    x = 1,603,978.18/1,366.89
  6. Step 6: Final answer
    x = 1,173.45

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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.