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Finding the Fourth Proportional to 5,642.86, 7,787.10 and 3,406

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Solution

The fourth proportional to 5,642.86, 7,787.10 and 3,406 is: 4,700.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.86 : 7,787.10 = 3,406 : x
  2. Step 2: Convert to fraction form
    5,642.86/7,787.10 = 3,406/x
  3. Step 3: Cross multiply
    5,642.86x = 7,787.10 × 3,406
  4. Step 4: Simplify right side
    5,642.86x = 26,522,862.60
  5. Step 5: Solve for x
    x = 26,522,862.60/5,642.86
  6. Step 6: Final answer
    x = 4,700.25

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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.