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Finding the Fourth Proportional to 528.31, 729.04 and 292.25

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Solution

The fourth proportional to 528.31, 729.04 and 292.25 is: 403.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.31 : 729.04 = 292.25 : x
  2. Step 2: Convert to fraction form
    528.31/729.04 = 292.25/x
  3. Step 3: Cross multiply
    528.31x = 729.04 × 292.25
  4. Step 4: Simplify right side
    528.31x = 213,056.83
  5. Step 5: Solve for x
    x = 213,056.83/528.31
  6. Step 6: Final answer
    x = 403.28

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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.