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Finding the Fourth Proportional to 1,670.59, 2,507.28 and 1,085.86

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Solution

The fourth proportional to 1,670.59, 2,507.28 and 1,085.86 is: 1,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.59 : 2,507.28 = 1,085.86 : x
  2. Step 2: Convert to fraction form
    1,670.59/2,507.28 = 1,085.86/x
  3. Step 3: Cross multiply
    1,670.59x = 2,507.28 × 1,085.86
  4. Step 4: Simplify right side
    1,670.59x = 2,722,555.06
  5. Step 5: Solve for x
    x = 2,722,555.06/1,670.59
  6. Step 6: Final answer
    x = 1,629.70

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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.