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Finding the Fourth Proportional to 405.04, 607.24 and 212.48

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Solution

The fourth proportional to 405.04, 607.24 and 212.48 is: 318.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.04 : 607.24 = 212.48 : x
  2. Step 2: Convert to fraction form
    405.04/607.24 = 212.48/x
  3. Step 3: Cross multiply
    405.04x = 607.24 × 212.48
  4. Step 4: Simplify right side
    405.04x = 129,026.36
  5. Step 5: Solve for x
    x = 129,026.36/405.04
  6. Step 6: Final answer
    x = 318.55

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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.