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Finding the Fourth Proportional to 1,123.66, 1,550.57 and 626.21

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Solution

The fourth proportional to 1,123.66, 1,550.57 and 626.21 is: 864.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.66 : 1,550.57 = 626.21 : x
  2. Step 2: Convert to fraction form
    1,123.66/1,550.57 = 626.21/x
  3. Step 3: Cross multiply
    1,123.66x = 1,550.57 × 626.21
  4. Step 4: Simplify right side
    1,123.66x = 970,982.44
  5. Step 5: Solve for x
    x = 970,982.44/1,123.66
  6. Step 6: Final answer
    x = 864.12

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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.