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Finding the Fourth Proportional to 1,953.32, 2,930.88 and 980.12

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Solution

The fourth proportional to 1,953.32, 2,930.88 and 980.12 is: 1,470.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.32 : 2,930.88 = 980.12 : x
  2. Step 2: Convert to fraction form
    1,953.32/2,930.88 = 980.12/x
  3. Step 3: Cross multiply
    1,953.32x = 2,930.88 × 980.12
  4. Step 4: Simplify right side
    1,953.32x = 2,872,614.11
  5. Step 5: Solve for x
    x = 2,872,614.11/1,953.32
  6. Step 6: Final answer
    x = 1,470.63

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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.