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Finding the Fourth Proportional to 633.40, 873.96 and 384.85

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Solution

The fourth proportional to 633.40, 873.96 and 384.85 is: 531.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.40 : 873.96 = 384.85 : x
  2. Step 2: Convert to fraction form
    633.40/873.96 = 384.85/x
  3. Step 3: Cross multiply
    633.40x = 873.96 × 384.85
  4. Step 4: Simplify right side
    633.40x = 336,343.51
  5. Step 5: Solve for x
    x = 336,343.51/633.40
  6. Step 6: Final answer
    x = 531.01

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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.