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Finding the Fourth Proportional to 1,666.56, 2,494.80 and 1,339.20

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Solution

The fourth proportional to 1,666.56, 2,494.80 and 1,339.20 is: 2,004.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.56 : 2,494.80 = 1,339.20 : x
  2. Step 2: Convert to fraction form
    1,666.56/2,494.80 = 1,339.20/x
  3. Step 3: Cross multiply
    1,666.56x = 2,494.80 × 1,339.20
  4. Step 4: Simplify right side
    1,666.56x = 3,341,036.16
  5. Step 5: Solve for x
    x = 3,341,036.16/1,666.56
  6. Step 6: Final answer
    x = 2,004.75

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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.