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Finding the Fourth Proportional to 1,123.23, 1,550.26 and 651.42

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Solution

The fourth proportional to 1,123.23, 1,550.26 and 651.42 is: 899.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.23 : 1,550.26 = 651.42 : x
  2. Step 2: Convert to fraction form
    1,123.23/1,550.26 = 651.42/x
  3. Step 3: Cross multiply
    1,123.23x = 1,550.26 × 651.42
  4. Step 4: Simplify right side
    1,123.23x = 1,009,870.37
  5. Step 5: Solve for x
    x = 1,009,870.37/1,123.23
  6. Step 6: Final answer
    x = 899.08

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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.