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Finding the Fourth Proportional to 832.16, 1,246.89 and 442.13

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Solution

The fourth proportional to 832.16, 1,246.89 and 442.13 is: 662.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.16 : 1,246.89 = 442.13 : x
  2. Step 2: Convert to fraction form
    832.16/1,246.89 = 442.13/x
  3. Step 3: Cross multiply
    832.16x = 1,246.89 × 442.13
  4. Step 4: Simplify right side
    832.16x = 551,287.48
  5. Step 5: Solve for x
    x = 551,287.48/832.16
  6. Step 6: Final answer
    x = 662.48

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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.