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Finding the Fourth Proportional to 397.83, 596.91 and 215.01

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Solution

The fourth proportional to 397.83, 596.91 and 215.01 is: 322.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.83 : 596.91 = 215.01 : x
  2. Step 2: Convert to fraction form
    397.83/596.91 = 215.01/x
  3. Step 3: Cross multiply
    397.83x = 596.91 × 215.01
  4. Step 4: Simplify right side
    397.83x = 128,341.62
  5. Step 5: Solve for x
    x = 128,341.62/397.83
  6. Step 6: Final answer
    x = 322.60

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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.