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Finding the Fourth Proportional to 215.04, 320.16 and 202.56

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Solution

The fourth proportional to 215.04, 320.16 and 202.56 is: 301.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.04 : 320.16 = 202.56 : x
  2. Step 2: Convert to fraction form
    215.04/320.16 = 202.56/x
  3. Step 3: Cross multiply
    215.04x = 320.16 × 202.56
  4. Step 4: Simplify right side
    215.04x = 64,851.61
  5. Step 5: Solve for x
    x = 64,851.61/215.04
  6. Step 6: Final answer
    x = 301.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.