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Finding the Fourth Proportional to 1,123.62, 1,550.68 and 651.64

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Solution

The fourth proportional to 1,123.62, 1,550.68 and 651.64 is: 899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.62 : 1,550.68 = 651.64 : x
  2. Step 2: Convert to fraction form
    1,123.62/1,550.68 = 651.64/x
  3. Step 3: Cross multiply
    1,123.62x = 1,550.68 × 651.64
  4. Step 4: Simplify right side
    1,123.62x = 1,010,485.12
  5. Step 5: Solve for x
    x = 1,010,485.12/1,123.62
  6. Step 6: Final answer
    x = 899.31

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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.