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Finding the Fourth Proportional to 1,133.06, 1,699.64 and 392.68

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Solution

The fourth proportional to 1,133.06, 1,699.64 and 392.68 is: 589.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.06 : 1,699.64 = 392.68 : x
  2. Step 2: Convert to fraction form
    1,133.06/1,699.64 = 392.68/x
  3. Step 3: Cross multiply
    1,133.06x = 1,699.64 × 392.68
  4. Step 4: Simplify right side
    1,133.06x = 667,404.17
  5. Step 5: Solve for x
    x = 667,404.17/1,133.06
  6. Step 6: Final answer
    x = 589.03

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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.