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Finding the Fourth Proportional to 833.32, 1,149.60 and 553.72

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Solution

The fourth proportional to 833.32, 1,149.60 and 553.72 is: 763.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.32 : 1,149.60 = 553.72 : x
  2. Step 2: Convert to fraction form
    833.32/1,149.60 = 553.72/x
  3. Step 3: Cross multiply
    833.32x = 1,149.60 × 553.72
  4. Step 4: Simplify right side
    833.32x = 636,556.51
  5. Step 5: Solve for x
    x = 636,556.51/833.32
  6. Step 6: Final answer
    x = 763.88

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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.