Home / 2,875.94-4,312.55-1,121.78

Finding the Fourth Proportional to 2,875.94, 4,312.55 and 1,121.78

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Solution

The fourth proportional to 2,875.94, 4,312.55 and 1,121.78 is: 1,682.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.94 : 4,312.55 = 1,121.78 : x
  2. Step 2: Convert to fraction form
    2,875.94/4,312.55 = 1,121.78/x
  3. Step 3: Cross multiply
    2,875.94x = 4,312.55 × 1,121.78
  4. Step 4: Simplify right side
    2,875.94x = 4,837,705.17
  5. Step 5: Solve for x
    x = 4,837,705.17/2,875.94
  6. Step 6: Final answer
    x = 1,682.13

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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.