Home / 2,015.12-2,780.80-1,130.92

Finding the Fourth Proportional to 2,015.12, 2,780.80 and 1,130.92

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Solution

The fourth proportional to 2,015.12, 2,780.80 and 1,130.92 is: 1,560.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.12 : 2,780.80 = 1,130.92 : x
  2. Step 2: Convert to fraction form
    2,015.12/2,780.80 = 1,130.92/x
  3. Step 3: Cross multiply
    2,015.12x = 2,780.80 × 1,130.92
  4. Step 4: Simplify right side
    2,015.12x = 3,144,862.34
  5. Step 5: Solve for x
    x = 3,144,862.34/2,015.12
  6. Step 6: Final answer
    x = 1,560.63

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.