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Finding the Fourth Proportional to 2,924.76, 4,387.92 and 976.68

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Solution

The fourth proportional to 2,924.76, 4,387.92 and 976.68 is: 1,465.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,924.76 : 4,387.92 = 976.68 : x
  2. Step 2: Convert to fraction form
    2,924.76/4,387.92 = 976.68/x
  3. Step 3: Cross multiply
    2,924.76x = 4,387.92 × 976.68
  4. Step 4: Simplify right side
    2,924.76x = 4,285,593.71
  5. Step 5: Solve for x
    x = 4,285,593.71/2,924.76
  6. Step 6: Final answer
    x = 1,465.28

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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.