Home / 2,135.90-2,947.02-1,204.40

Finding the Fourth Proportional to 2,135.90, 2,947.02 and 1,204.40

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Solution

The fourth proportional to 2,135.90, 2,947.02 and 1,204.40 is: 1,661.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.90 : 2,947.02 = 1,204.40 : x
  2. Step 2: Convert to fraction form
    2,135.90/2,947.02 = 1,204.40/x
  3. Step 3: Cross multiply
    2,135.90x = 2,947.02 × 1,204.40
  4. Step 4: Simplify right side
    2,135.90x = 3,549,390.89
  5. Step 5: Solve for x
    x = 3,549,390.89/2,135.90
  6. Step 6: Final answer
    x = 1,661.78

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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.