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Finding the Fourth Proportional to 554.24, 830.88 and 212.16

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Solution

The fourth proportional to 554.24, 830.88 and 212.16 is: 318.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.24 : 830.88 = 212.16 : x
  2. Step 2: Convert to fraction form
    554.24/830.88 = 212.16/x
  3. Step 3: Cross multiply
    554.24x = 830.88 × 212.16
  4. Step 4: Simplify right side
    554.24x = 176,279.50
  5. Step 5: Solve for x
    x = 176,279.50/554.24
  6. Step 6: Final answer
    x = 318.06

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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.