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Finding the Fourth Proportional to 862.71, 1,190.03 and 626.38

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Solution

The fourth proportional to 862.71, 1,190.03 and 626.38 is: 864.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.71 : 1,190.03 = 626.38 : x
  2. Step 2: Convert to fraction form
    862.71/1,190.03 = 626.38/x
  3. Step 3: Cross multiply
    862.71x = 1,190.03 × 626.38
  4. Step 4: Simplify right side
    862.71x = 745,401.91
  5. Step 5: Solve for x
    x = 745,401.91/862.71
  6. Step 6: Final answer
    x = 864.03

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1.5x scale

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.