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Finding the Fourth Proportional to 883.91, 1,323.14 and 621.47

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Solution

The fourth proportional to 883.91, 1,323.14 and 621.47 is: 930.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.91 : 1,323.14 = 621.47 : x
  2. Step 2: Convert to fraction form
    883.91/1,323.14 = 621.47/x
  3. Step 3: Cross multiply
    883.91x = 1,323.14 × 621.47
  4. Step 4: Simplify right side
    883.91x = 822,292.02
  5. Step 5: Solve for x
    x = 822,292.02/883.91
  6. Step 6: Final answer
    x = 930.29

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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.