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Finding the Fourth Proportional to 651.87, 977.94 and 218.97

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Solution

The fourth proportional to 651.87, 977.94 and 218.97 is: 328.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.87 : 977.94 = 218.97 : x
  2. Step 2: Convert to fraction form
    651.87/977.94 = 218.97/x
  3. Step 3: Cross multiply
    651.87x = 977.94 × 218.97
  4. Step 4: Simplify right side
    651.87x = 214,139.52
  5. Step 5: Solve for x
    x = 214,139.52/651.87
  6. Step 6: Final answer
    x = 328.50

Related Problems

Find fourth proportional to 325.94, 488.97 and 109.49
Half scale
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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.