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Finding the Fourth Proportional to 1,112.84, 1,669.36 and 332.86

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Solution

The fourth proportional to 1,112.84, 1,669.36 and 332.86 is: 499.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.84 : 1,669.36 = 332.86 : x
  2. Step 2: Convert to fraction form
    1,112.84/1,669.36 = 332.86/x
  3. Step 3: Cross multiply
    1,112.84x = 1,669.36 × 332.86
  4. Step 4: Simplify right side
    1,112.84x = 555,663.17
  5. Step 5: Solve for x
    x = 555,663.17/1,112.84
  6. Step 6: Final answer
    x = 499.32

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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.