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Finding the Fourth Proportional to 2,930.06, 4,394.55 and 981.74

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Solution

The fourth proportional to 2,930.06, 4,394.55 and 981.74 is: 1,472.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.06 : 4,394.55 = 981.74 : x
  2. Step 2: Convert to fraction form
    2,930.06/4,394.55 = 981.74/x
  3. Step 3: Cross multiply
    2,930.06x = 4,394.55 × 981.74
  4. Step 4: Simplify right side
    2,930.06x = 4,314,305.52
  5. Step 5: Solve for x
    x = 4,314,305.52/2,930.06
  6. Step 6: Final answer
    x = 1,472.43

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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.