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Finding the Fourth Proportional to 4,920.39, 7,376.93 and 2,972.13

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Solution

The fourth proportional to 4,920.39, 7,376.93 and 2,972.13 is: 4,455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.39 : 7,376.93 = 2,972.13 : x
  2. Step 2: Convert to fraction form
    4,920.39/7,376.93 = 2,972.13/x
  3. Step 3: Cross multiply
    4,920.39x = 7,376.93 × 2,972.13
  4. Step 4: Simplify right side
    4,920.39x = 21,925,180.10
  5. Step 5: Solve for x
    x = 21,925,180.10/4,920.39
  6. Step 6: Final answer
    x = 4,455.98

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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.