Home / 1,312.18-1,809.04-1,124.86

Finding the Fourth Proportional to 1,312.18, 1,809.04 and 1,124.86

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Solution

The fourth proportional to 1,312.18, 1,809.04 and 1,124.86 is: 1,550.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.18 : 1,809.04 = 1,124.86 : x
  2. Step 2: Convert to fraction form
    1,312.18/1,809.04 = 1,124.86/x
  3. Step 3: Cross multiply
    1,312.18x = 1,809.04 × 1,124.86
  4. Step 4: Simplify right side
    1,312.18x = 2,034,916.73
  5. Step 5: Solve for x
    x = 2,034,916.73/1,312.18
  6. Step 6: Final answer
    x = 1,550.79

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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.