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Finding the Fourth Proportional to 364.33, 502.40 and 285.50

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Solution

The fourth proportional to 364.33, 502.40 and 285.50 is: 393.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.33 : 502.40 = 285.50 : x
  2. Step 2: Convert to fraction form
    364.33/502.40 = 285.50/x
  3. Step 3: Cross multiply
    364.33x = 502.40 × 285.50
  4. Step 4: Simplify right side
    364.33x = 143,433.77
  5. Step 5: Solve for x
    x = 143,433.77/364.33
  6. Step 6: Final answer
    x = 393.70

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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.