Home / 1,910.19-2,864.61-869.31

Finding the Fourth Proportional to 1,910.19, 2,864.61 and 869.31

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Solution

The fourth proportional to 1,910.19, 2,864.61 and 869.31 is: 1,303.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.19 : 2,864.61 = 869.31 : x
  2. Step 2: Convert to fraction form
    1,910.19/2,864.61 = 869.31/x
  3. Step 3: Cross multiply
    1,910.19x = 2,864.61 × 869.31
  4. Step 4: Simplify right side
    1,910.19x = 2,490,234.12
  5. Step 5: Solve for x
    x = 2,490,234.12/1,910.19
  6. Step 6: Final answer
    x = 1,303.66

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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.