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Finding the Fourth Proportional to 528.65, 729.50 and 292.58

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Solution

The fourth proportional to 528.65, 729.50 and 292.58 is: 403.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.65 : 729.50 = 292.58 : x
  2. Step 2: Convert to fraction form
    528.65/729.50 = 292.58/x
  3. Step 3: Cross multiply
    528.65x = 729.50 × 292.58
  4. Step 4: Simplify right side
    528.65x = 213,439.53
  5. Step 5: Solve for x
    x = 213,439.53/528.65
  6. Step 6: Final answer
    x = 403.75

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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.