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Finding the Fourth Proportional to 832.95, 1,149.21 and 478.83

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Solution

The fourth proportional to 832.95, 1,149.21 and 478.83 is: 660.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.95 : 1,149.21 = 478.83 : x
  2. Step 2: Convert to fraction form
    832.95/1,149.21 = 478.83/x
  3. Step 3: Cross multiply
    832.95x = 1,149.21 × 478.83
  4. Step 4: Simplify right side
    832.95x = 550,276.22
  5. Step 5: Solve for x
    x = 550,276.22/832.95
  6. Step 6: Final answer
    x = 660.64

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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.