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Finding the Fourth Proportional to 651.11, 899.66 and 627.76

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Solution

The fourth proportional to 651.11, 899.66 and 627.76 is: 867.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.11 : 899.66 = 627.76 : x
  2. Step 2: Convert to fraction form
    651.11/899.66 = 627.76/x
  3. Step 3: Cross multiply
    651.11x = 899.66 × 627.76
  4. Step 4: Simplify right side
    651.11x = 564,769.88
  5. Step 5: Solve for x
    x = 564,769.88/651.11
  6. Step 6: Final answer
    x = 867.39

Related Problems

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.