Home / 2,385.55-3,291.66-1,390.87

Finding the Fourth Proportional to 2,385.55, 3,291.66 and 1,390.87

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Solution

The fourth proportional to 2,385.55, 3,291.66 and 1,390.87 is: 1,919.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.55 : 3,291.66 = 1,390.87 : x
  2. Step 2: Convert to fraction form
    2,385.55/3,291.66 = 1,390.87/x
  3. Step 3: Cross multiply
    2,385.55x = 3,291.66 × 1,390.87
  4. Step 4: Simplify right side
    2,385.55x = 4,578,271.14
  5. Step 5: Solve for x
    x = 4,578,271.14/2,385.55
  6. Step 6: Final answer
    x = 1,919.17

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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.