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Finding the Fourth Proportional to 479.08, 722.16 and 438.08

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Solution

The fourth proportional to 479.08, 722.16 and 438.08 is: 660.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.08 : 722.16 = 438.08 : x
  2. Step 2: Convert to fraction form
    479.08/722.16 = 438.08/x
  3. Step 3: Cross multiply
    479.08x = 722.16 × 438.08
  4. Step 4: Simplify right side
    479.08x = 316,363.85
  5. Step 5: Solve for x
    x = 316,363.85/479.08
  6. Step 6: Final answer
    x = 660.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.