Home / 1,069.57-1,476.20-621.71

Finding the Fourth Proportional to 1,069.57, 1,476.20 and 621.71

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Solution

The fourth proportional to 1,069.57, 1,476.20 and 621.71 is: 858.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.57 : 1,476.20 = 621.71 : x
  2. Step 2: Convert to fraction form
    1,069.57/1,476.20 = 621.71/x
  3. Step 3: Cross multiply
    1,069.57x = 1,476.20 × 621.71
  4. Step 4: Simplify right side
    1,069.57x = 917,768.30
  5. Step 5: Solve for x
    x = 917,768.30/1,069.57
  6. Step 6: Final answer
    x = 858.07

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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.