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Finding the Fourth Proportional to 1,123.46, 1,550.19 and 626.09

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Solution

The fourth proportional to 1,123.46, 1,550.19 and 626.09 is: 863.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.46 : 1,550.19 = 626.09 : x
  2. Step 2: Convert to fraction form
    1,123.46/1,550.19 = 626.09/x
  3. Step 3: Cross multiply
    1,123.46x = 1,550.19 × 626.09
  4. Step 4: Simplify right side
    1,123.46x = 970,550.71
  5. Step 5: Solve for x
    x = 970,550.71/1,123.46
  6. Step 6: Final answer
    x = 863.90

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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.