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Finding the Fourth Proportional to 602.87, 904.20 and 213.16

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Solution

The fourth proportional to 602.87, 904.20 and 213.16 is: 319.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.87 : 904.20 = 213.16 : x
  2. Step 2: Convert to fraction form
    602.87/904.20 = 213.16/x
  3. Step 3: Cross multiply
    602.87x = 904.20 × 213.16
  4. Step 4: Simplify right side
    602.87x = 192,737.01
  5. Step 5: Solve for x
    x = 192,737.01/602.87
  6. Step 6: Final answer
    x = 319.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.