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Finding the Fourth Proportional to 529.84, 731.20 and 320.02

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Solution

The fourth proportional to 529.84, 731.20 and 320.02 is: 441.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.84 : 731.20 = 320.02 : x
  2. Step 2: Convert to fraction form
    529.84/731.20 = 320.02/x
  3. Step 3: Cross multiply
    529.84x = 731.20 × 320.02
  4. Step 4: Simplify right side
    529.84x = 233,998.62
  5. Step 5: Solve for x
    x = 233,998.62/529.84
  6. Step 6: Final answer
    x = 441.64

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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.