Home / 1,121.32-1,547.38-623.96

Finding the Fourth Proportional to 1,121.32, 1,547.38 and 623.96

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Solution

The fourth proportional to 1,121.32, 1,547.38 and 623.96 is: 861.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.32 : 1,547.38 = 623.96 : x
  2. Step 2: Convert to fraction form
    1,121.32/1,547.38 = 623.96/x
  3. Step 3: Cross multiply
    1,121.32x = 1,547.38 × 623.96
  4. Step 4: Simplify right side
    1,121.32x = 965,503.22
  5. Step 5: Solve for x
    x = 965,503.22/1,121.32
  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.