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Finding the Fourth Proportional to 832.80, 1,149.82 and 553.58

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Solution

The fourth proportional to 832.80, 1,149.82 and 553.58 is: 764.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.80 : 1,149.82 = 553.58 : x
  2. Step 2: Convert to fraction form
    832.80/1,149.82 = 553.58/x
  3. Step 3: Cross multiply
    832.80x = 1,149.82 × 553.58
  4. Step 4: Simplify right side
    832.80x = 636,510.22
  5. Step 5: Solve for x
    x = 636,510.22/832.80
  6. Step 6: Final answer
    x = 764.30

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1.5x scale

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.