Home / 1,121.26-1,547.32-623.89

Finding the Fourth Proportional to 1,121.26, 1,547.32 and 623.89

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Solution

The fourth proportional to 1,121.26, 1,547.32 and 623.89 is: 860.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.26 : 1,547.32 = 623.89 : x
  2. Step 2: Convert to fraction form
    1,121.26/1,547.32 = 623.89/x
  3. Step 3: Cross multiply
    1,121.26x = 1,547.32 × 623.89
  4. Step 4: Simplify right side
    1,121.26x = 965,359.02
  5. Step 5: Solve for x
    x = 965,359.02/1,121.26
  6. Step 6: Final answer
    x = 860.96

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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.