Home / 1,863.61-2,571.85-1,117.90

Finding the Fourth Proportional to 1,863.61, 2,571.85 and 1,117.90

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Solution

The fourth proportional to 1,863.61, 2,571.85 and 1,117.90 is: 1,542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.61 : 2,571.85 = 1,117.90 : x
  2. Step 2: Convert to fraction form
    1,863.61/2,571.85 = 1,117.90/x
  3. Step 3: Cross multiply
    1,863.61x = 2,571.85 × 1,117.90
  4. Step 4: Simplify right side
    1,863.61x = 2,875,075.73
  5. Step 5: Solve for x
    x = 2,875,075.73/1,863.61
  6. Step 6: Final answer
    x = 1,542.75

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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.