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Finding the Fourth Proportional to 651.79, 977.88 and 218.96

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Solution

The fourth proportional to 651.79, 977.88 and 218.96 is: 328.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.79 : 977.88 = 218.96 : x
  2. Step 2: Convert to fraction form
    651.79/977.88 = 218.96/x
  3. Step 3: Cross multiply
    651.79x = 977.88 × 218.96
  4. Step 4: Simplify right side
    651.79x = 214,116.60
  5. Step 5: Solve for x
    x = 214,116.60/651.79
  6. Step 6: Final answer
    x = 328.51

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Double scale
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Similar ratio
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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.