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Finding the Fourth Proportional to 1,133.61, 1,700.23 and 311.89

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Solution

The fourth proportional to 1,133.61, 1,700.23 and 311.89 is: 467.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.61 : 1,700.23 = 311.89 : x
  2. Step 2: Convert to fraction form
    1,133.61/1,700.23 = 311.89/x
  3. Step 3: Cross multiply
    1,133.61x = 1,700.23 × 311.89
  4. Step 4: Simplify right side
    1,133.61x = 530,284.73
  5. Step 5: Solve for x
    x = 530,284.73/1,133.61
  6. Step 6: Final answer
    x = 467.78

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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.