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Finding the Fourth Proportional to 653.16, 979.59 and 220.35

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Solution

The fourth proportional to 653.16, 979.59 and 220.35 is: 330.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.16 : 979.59 = 220.35 : x
  2. Step 2: Convert to fraction form
    653.16/979.59 = 220.35/x
  3. Step 3: Cross multiply
    653.16x = 979.59 × 220.35
  4. Step 4: Simplify right side
    653.16x = 215,852.66
  5. Step 5: Solve for x
    x = 215,852.66/653.16
  6. Step 6: Final answer
    x = 330.47

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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.