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Finding the Fourth Proportional to 1,133.39, 1,699.87 and 311.46

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Solution

The fourth proportional to 1,133.39, 1,699.87 and 311.46 is: 467.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.39 : 1,699.87 = 311.46 : x
  2. Step 2: Convert to fraction form
    1,133.39/1,699.87 = 311.46/x
  3. Step 3: Cross multiply
    1,133.39x = 1,699.87 × 311.46
  4. Step 4: Simplify right side
    1,133.39x = 529,441.51
  5. Step 5: Solve for x
    x = 529,441.51/1,133.39
  6. Step 6: Final answer
    x = 467.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.