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Finding the Fourth Proportional to 1,666.28, 2,498.07 and 693.11

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Solution

The fourth proportional to 1,666.28, 2,498.07 and 693.11 is: 1,039.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.28 : 2,498.07 = 693.11 : x
  2. Step 2: Convert to fraction form
    1,666.28/2,498.07 = 693.11/x
  3. Step 3: Cross multiply
    1,666.28x = 2,498.07 × 693.11
  4. Step 4: Simplify right side
    1,666.28x = 1,731,446.14
  5. Step 5: Solve for x
    x = 1,731,446.14/1,666.28
  6. Step 6: Final answer
    x = 1,039.11

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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.