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Finding the Fourth Proportional to 1,666.87, 2,498.92 and 971.83

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Solution

The fourth proportional to 1,666.87, 2,498.92 and 971.83 is: 1,456.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.87 : 2,498.92 = 971.83 : x
  2. Step 2: Convert to fraction form
    1,666.87/2,498.92 = 971.83/x
  3. Step 3: Cross multiply
    1,666.87x = 2,498.92 × 971.83
  4. Step 4: Simplify right side
    1,666.87x = 2,428,525.42
  5. Step 5: Solve for x
    x = 2,428,525.42/1,666.87
  6. Step 6: Final answer
    x = 1,456.94

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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.