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Finding the Fourth Proportional to 385.02, 531.50 and 322.85

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Solution

The fourth proportional to 385.02, 531.50 and 322.85 is: 445.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.02 : 531.50 = 322.85 : x
  2. Step 2: Convert to fraction form
    385.02/531.50 = 322.85/x
  3. Step 3: Cross multiply
    385.02x = 531.50 × 322.85
  4. Step 4: Simplify right side
    385.02x = 171,594.49
  5. Step 5: Solve for x
    x = 171,594.49/385.02
  6. Step 6: Final answer
    x = 445.68

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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.