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Finding the Fourth Proportional to 934.33, 1,287.34 and 623.29

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Solution

The fourth proportional to 934.33, 1,287.34 and 623.29 is: 858.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.33 : 1,287.34 = 623.29 : x
  2. Step 2: Convert to fraction form
    934.33/1,287.34 = 623.29/x
  3. Step 3: Cross multiply
    934.33x = 1,287.34 × 623.29
  4. Step 4: Simplify right side
    934.33x = 802,386.15
  5. Step 5: Solve for x
    x = 802,386.15/934.33
  6. Step 6: Final answer
    x = 858.78

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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.