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Finding the Fourth Proportional to 302.10, 453.45 and 215.53

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Solution

The fourth proportional to 302.10, 453.45 and 215.53 is: 323.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.10 : 453.45 = 215.53 : x
  2. Step 2: Convert to fraction form
    302.10/453.45 = 215.53/x
  3. Step 3: Cross multiply
    302.10x = 453.45 × 215.53
  4. Step 4: Simplify right side
    302.10x = 97,730.14
  5. Step 5: Solve for x
    x = 97,730.14/302.10
  6. Step 6: Final answer
    x = 323.51

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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.