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Finding the Fourth Proportional to 657.82, 986.46 and 219.07

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Solution

The fourth proportional to 657.82, 986.46 and 219.07 is: 328.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.82 : 986.46 = 219.07 : x
  2. Step 2: Convert to fraction form
    657.82/986.46 = 219.07/x
  3. Step 3: Cross multiply
    657.82x = 986.46 × 219.07
  4. Step 4: Simplify right side
    657.82x = 216,103.79
  5. Step 5: Solve for x
    x = 216,103.79/657.82
  6. Step 6: Final answer
    x = 328.52

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Double scale
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1.5x scale

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.