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Finding the Fourth Proportional to 657.18, 986.85 and 441.18

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Solution

The fourth proportional to 657.18, 986.85 and 441.18 is: 662.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.18 : 986.85 = 441.18 : x
  2. Step 2: Convert to fraction form
    657.18/986.85 = 441.18/x
  3. Step 3: Cross multiply
    657.18x = 986.85 × 441.18
  4. Step 4: Simplify right side
    657.18x = 435,378.48
  5. Step 5: Solve for x
    x = 435,378.48/657.18
  6. Step 6: Final answer
    x = 662.50

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Half scale
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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.