Home / 1,121.43-1,547.45-623.99

Finding the Fourth Proportional to 1,121.43, 1,547.45 and 623.99

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Solution

The fourth proportional to 1,121.43, 1,547.45 and 623.99 is: 861.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.43 : 1,547.45 = 623.99 : x
  2. Step 2: Convert to fraction form
    1,121.43/1,547.45 = 623.99/x
  3. Step 3: Cross multiply
    1,121.43x = 1,547.45 × 623.99
  4. Step 4: Simplify right side
    1,121.43x = 965,593.33
  5. Step 5: Solve for x
    x = 965,593.33/1,121.43
  6. Step 6: Final answer
    x = 861.04

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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.