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Finding the Fourth Proportional to 1,154.67, 1,590.06 and 859.42

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Solution

The fourth proportional to 1,154.67, 1,590.06 and 859.42 is: 1,183.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.67 : 1,590.06 = 859.42 : x
  2. Step 2: Convert to fraction form
    1,154.67/1,590.06 = 859.42/x
  3. Step 3: Cross multiply
    1,154.67x = 1,590.06 × 859.42
  4. Step 4: Simplify right side
    1,154.67x = 1,366,529.37
  5. Step 5: Solve for x
    x = 1,366,529.37/1,154.67
  6. Step 6: Final answer
    x = 1,183.48

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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.