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Finding the Fourth Proportional to 3,470.16, 4,788.68 and 1,978.14

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Solution

The fourth proportional to 3,470.16, 4,788.68 and 1,978.14 is: 2,729.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,470.16 : 4,788.68 = 1,978.14 : x
  2. Step 2: Convert to fraction form
    3,470.16/4,788.68 = 1,978.14/x
  3. Step 3: Cross multiply
    3,470.16x = 4,788.68 × 1,978.14
  4. Step 4: Simplify right side
    3,470.16x = 9,472,679.46
  5. Step 5: Solve for x
    x = 9,472,679.46/3,470.16
  6. Step 6: Final answer
    x = 2,729.75

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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.