Home / 2,178.90-3,005.88-1,294.20

Finding the Fourth Proportional to 2,178.90, 3,005.88 and 1,294.20

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Solution

The fourth proportional to 2,178.90, 3,005.88 and 1,294.20 is: 1,785.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.90 : 3,005.88 = 1,294.20 : x
  2. Step 2: Convert to fraction form
    2,178.90/3,005.88 = 1,294.20/x
  3. Step 3: Cross multiply
    2,178.90x = 3,005.88 × 1,294.20
  4. Step 4: Simplify right side
    2,178.90x = 3,890,209.90
  5. Step 5: Solve for x
    x = 3,890,209.90/2,178.90
  6. Step 6: Final answer
    x = 1,785.40

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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.