Home / 1,121.05-1,547.07-623.71

Finding the Fourth Proportional to 1,121.05, 1,547.07 and 623.71

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Solution

The fourth proportional to 1,121.05, 1,547.07 and 623.71 is: 860.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.05 : 1,547.07 = 623.71 : x
  2. Step 2: Convert to fraction form
    1,121.05/1,547.07 = 623.71/x
  3. Step 3: Cross multiply
    1,121.05x = 1,547.07 × 623.71
  4. Step 4: Simplify right side
    1,121.05x = 964,923.03
  5. Step 5: Solve for x
    x = 964,923.03/1,121.05
  6. Step 6: Final answer
    x = 860.73

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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.