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Finding the Fourth Proportional to 469.16, 703.72 and 212.66

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Solution

The fourth proportional to 469.16, 703.72 and 212.66 is: 318.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.16 : 703.72 = 212.66 : x
  2. Step 2: Convert to fraction form
    469.16/703.72 = 212.66/x
  3. Step 3: Cross multiply
    469.16x = 703.72 × 212.66
  4. Step 4: Simplify right side
    469.16x = 149,653.10
  5. Step 5: Solve for x
    x = 149,653.10/469.16
  6. Step 6: Final answer
    x = 318.98

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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.