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Finding the Fourth Proportional to 1,123.65, 1,550.61 and 626.28

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Solution

The fourth proportional to 1,123.65, 1,550.61 and 626.28 is: 864.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.65 : 1,550.61 = 626.28 : x
  2. Step 2: Convert to fraction form
    1,123.65/1,550.61 = 626.28/x
  3. Step 3: Cross multiply
    1,123.65x = 1,550.61 × 626.28
  4. Step 4: Simplify right side
    1,123.65x = 971,116.03
  5. Step 5: Solve for x
    x = 971,116.03/1,123.65
  6. Step 6: Final answer
    x = 864.25

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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.