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Finding the Fourth Proportional to 528.32, 729.11 and 307.33

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Solution

The fourth proportional to 528.32, 729.11 and 307.33 is: 424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.32 : 729.11 = 307.33 : x
  2. Step 2: Convert to fraction form
    528.32/729.11 = 307.33/x
  3. Step 3: Cross multiply
    528.32x = 729.11 × 307.33
  4. Step 4: Simplify right side
    528.32x = 224,076.32
  5. Step 5: Solve for x
    x = 224,076.32/528.32
  6. Step 6: Final answer
    x = 424.13

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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.