Home / 1,947.95-2,688.19-1,108.61

Finding the Fourth Proportional to 1,947.95, 2,688.19 and 1,108.61

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Solution

The fourth proportional to 1,947.95, 2,688.19 and 1,108.61 is: 1,529.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.95 : 2,688.19 = 1,108.61 : x
  2. Step 2: Convert to fraction form
    1,947.95/2,688.19 = 1,108.61/x
  3. Step 3: Cross multiply
    1,947.95x = 2,688.19 × 1,108.61
  4. Step 4: Simplify right side
    1,947.95x = 2,980,155.74
  5. Step 5: Solve for x
    x = 2,980,155.74/1,947.95
  6. Step 6: Final answer
    x = 1,529.89

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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.