Home / 1,765.89-2,647.35-1,115.19

Finding the Fourth Proportional to 1,765.89, 2,647.35 and 1,115.19

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Solution

The fourth proportional to 1,765.89, 2,647.35 and 1,115.19 is: 1,671.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.89 : 2,647.35 = 1,115.19 : x
  2. Step 2: Convert to fraction form
    1,765.89/2,647.35 = 1,115.19/x
  3. Step 3: Cross multiply
    1,765.89x = 2,647.35 × 1,115.19
  4. Step 4: Simplify right side
    1,765.89x = 2,952,298.25
  5. Step 5: Solve for x
    x = 2,952,298.25/1,765.89
  6. Step 6: Final answer
    x = 1,671.85

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1.5x scale

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.