Home / 4,310.38-6,465.89-1,390.78

Finding the Fourth Proportional to 4,310.38, 6,465.89 and 1,390.78

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Solution

The fourth proportional to 4,310.38, 6,465.89 and 1,390.78 is: 2,086.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,310.38 : 6,465.89 = 1,390.78 : x
  2. Step 2: Convert to fraction form
    4,310.38/6,465.89 = 1,390.78/x
  3. Step 3: Cross multiply
    4,310.38x = 6,465.89 × 1,390.78
  4. Step 4: Simplify right side
    4,310.38x = 8,992,630.49
  5. Step 5: Solve for x
    x = 8,992,630.49/4,310.38
  6. Step 6: Final answer
    x = 2,086.27

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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.