Home / 2,815.29-4,220.65-1,173.07

Finding the Fourth Proportional to 2,815.29, 4,220.65 and 1,173.07

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Solution

The fourth proportional to 2,815.29, 4,220.65 and 1,173.07 is: 1,758.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.29 : 4,220.65 = 1,173.07 : x
  2. Step 2: Convert to fraction form
    2,815.29/4,220.65 = 1,173.07/x
  3. Step 3: Cross multiply
    2,815.29x = 4,220.65 × 1,173.07
  4. Step 4: Simplify right side
    2,815.29x = 4,951,117.90
  5. Step 5: Solve for x
    x = 4,951,117.90/2,815.29
  6. Step 6: Final answer
    x = 1,758.65

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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.