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Finding the Fourth Proportional to 302.10, 416.70 and 203.82

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Solution

The fourth proportional to 302.10, 416.70 and 203.82 is: 281.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.10 : 416.70 = 203.82 : x
  2. Step 2: Convert to fraction form
    302.10/416.70 = 203.82/x
  3. Step 3: Cross multiply
    302.10x = 416.70 × 203.82
  4. Step 4: Simplify right side
    302.10x = 84,931.79
  5. Step 5: Solve for x
    x = 84,931.79/302.10
  6. Step 6: Final answer
    x = 281.14

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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.