Home / 3,854.40-5,774.70-1,387.64

Finding the Fourth Proportional to 3,854.40, 5,774.70 and 1,387.64

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Solution

The fourth proportional to 3,854.40, 5,774.70 and 1,387.64 is: 2,078.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,854.40 : 5,774.70 = 1,387.64 : x
  2. Step 2: Convert to fraction form
    3,854.40/5,774.70 = 1,387.64/x
  3. Step 3: Cross multiply
    3,854.40x = 5,774.70 × 1,387.64
  4. Step 4: Simplify right side
    3,854.40x = 8,013,204.71
  5. Step 5: Solve for x
    x = 8,013,204.71/3,854.40
  6. Step 6: Final answer
    x = 2,078.98

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1.5x scale

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.