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Finding the Fourth Proportional to 1,985.74, 2,977.95 and 752.86

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Solution

The fourth proportional to 1,985.74, 2,977.95 and 752.86 is: 1,129.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.74 : 2,977.95 = 752.86 : x
  2. Step 2: Convert to fraction form
    1,985.74/2,977.95 = 752.86/x
  3. Step 3: Cross multiply
    1,985.74x = 2,977.95 × 752.86
  4. Step 4: Simplify right side
    1,985.74x = 2,241,979.44
  5. Step 5: Solve for x
    x = 2,241,979.44/1,985.74
  6. Step 6: Final answer
    x = 1,129.04

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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.