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Finding the Fourth Proportional to 529.94, 731.40 and 320.15

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Solution

The fourth proportional to 529.94, 731.40 and 320.15 is: 441.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.94 : 731.40 = 320.15 : x
  2. Step 2: Convert to fraction form
    529.94/731.40 = 320.15/x
  3. Step 3: Cross multiply
    529.94x = 731.40 × 320.15
  4. Step 4: Simplify right side
    529.94x = 234,154.05
  5. Step 5: Solve for x
    x = 234,154.05/529.94
  6. Step 6: Final answer
    x = 441.85

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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.