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Finding the Fourth Proportional to 1,667.09, 2,499.80 and 556.11

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Solution

The fourth proportional to 1,667.09, 2,499.80 and 556.11 is: 833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,667.09 : 2,499.80 = 556.11 : x
  2. Step 2: Convert to fraction form
    1,667.09/2,499.80 = 556.11/x
  3. Step 3: Cross multiply
    1,667.09x = 2,499.80 × 556.11
  4. Step 4: Simplify right side
    1,667.09x = 1,390,161.00
  5. Step 5: Solve for x
    x = 1,390,161.00/1,667.09
  6. Step 6: Final answer
    x = 833.88

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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.