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Finding the Fourth Proportional to 651.50, 974.58 and 486.87

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Solution

The fourth proportional to 651.50, 974.58 and 486.87 is: 728.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.50 : 974.58 = 486.87 : x
  2. Step 2: Convert to fraction form
    651.50/974.58 = 486.87/x
  3. Step 3: Cross multiply
    651.50x = 974.58 × 486.87
  4. Step 4: Simplify right side
    651.50x = 474,493.76
  5. Step 5: Solve for x
    x = 474,493.76/651.50
  6. Step 6: Final answer
    x = 728.31

Related Problems

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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.