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Finding the Fourth Proportional to 2,929.43, 4,393.68 and 981.65

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Solution

The fourth proportional to 2,929.43, 4,393.68 and 981.65 is: 1,472.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,929.43 : 4,393.68 = 981.65 : x
  2. Step 2: Convert to fraction form
    2,929.43/4,393.68 = 981.65/x
  3. Step 3: Cross multiply
    2,929.43x = 4,393.68 × 981.65
  4. Step 4: Simplify right side
    2,929.43x = 4,313,034.00
  5. Step 5: Solve for x
    x = 4,313,034.00/2,929.43
  6. Step 6: Final answer
    x = 1,472.31

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1.5x scale

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.