Home / 2,088.43-3,129.95-918.12

Finding the Fourth Proportional to 2,088.43, 3,129.95 and 918.12

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Solution

The fourth proportional to 2,088.43, 3,129.95 and 918.12 is: 1,376.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,088.43 : 3,129.95 = 918.12 : x
  2. Step 2: Convert to fraction form
    2,088.43/3,129.95 = 918.12/x
  3. Step 3: Cross multiply
    2,088.43x = 3,129.95 × 918.12
  4. Step 4: Simplify right side
    2,088.43x = 2,873,680.62
  5. Step 5: Solve for x
    x = 2,873,680.62/2,088.43
  6. Step 6: Final answer
    x = 1,376.00

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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.