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Finding the Fourth Proportional to 651.82, 977.62 and 218.88

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Solution

The fourth proportional to 651.82, 977.62 and 218.88 is: 328.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.82 : 977.62 = 218.88 : x
  2. Step 2: Convert to fraction form
    651.82/977.62 = 218.88/x
  3. Step 3: Cross multiply
    651.82x = 977.62 × 218.88
  4. Step 4: Simplify right side
    651.82x = 213,981.47
  5. Step 5: Solve for x
    x = 213,981.47/651.82
  6. Step 6: Final answer
    x = 328.28

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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.