Home / 2,385.04-3,291.38-1,390.92

Finding the Fourth Proportional to 2,385.04, 3,291.38 and 1,390.92

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Solution

The fourth proportional to 2,385.04, 3,291.38 and 1,390.92 is: 1,919.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.04 : 3,291.38 = 1,390.92 : x
  2. Step 2: Convert to fraction form
    2,385.04/3,291.38 = 1,390.92/x
  3. Step 3: Cross multiply
    2,385.04x = 3,291.38 × 1,390.92
  4. Step 4: Simplify right side
    2,385.04x = 4,578,046.27
  5. Step 5: Solve for x
    x = 4,578,046.27/2,385.04
  6. Step 6: Final answer
    x = 1,919.48

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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.