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Finding the Fourth Proportional to 487.01, 730.55 and 212.96

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Solution

The fourth proportional to 487.01, 730.55 and 212.96 is: 319.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.01 : 730.55 = 212.96 : x
  2. Step 2: Convert to fraction form
    487.01/730.55 = 212.96/x
  3. Step 3: Cross multiply
    487.01x = 730.55 × 212.96
  4. Step 4: Simplify right side
    487.01x = 155,580.29
  5. Step 5: Solve for x
    x = 155,580.29/487.01
  6. Step 6: Final answer
    x = 319.46

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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.