Home / 1,411.29-2,117.25-486.86

Finding the Fourth Proportional to 1,411.29, 2,117.25 and 486.86

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Solution

The fourth proportional to 1,411.29, 2,117.25 and 486.86 is: 730.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.29 : 2,117.25 = 486.86 : x
  2. Step 2: Convert to fraction form
    1,411.29/2,117.25 = 486.86/x
  3. Step 3: Cross multiply
    1,411.29x = 2,117.25 × 486.86
  4. Step 4: Simplify right side
    1,411.29x = 1,030,791.31
  5. Step 5: Solve for x
    x = 1,030,791.31/1,411.29
  6. Step 6: Final answer
    x = 730.39

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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.