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Finding the Fourth Proportional to 651.87, 976.89 and 489.45

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Solution

The fourth proportional to 651.87, 976.89 and 489.45 is: 733.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.87 : 976.89 = 489.45 : x
  2. Step 2: Convert to fraction form
    651.87/976.89 = 489.45/x
  3. Step 3: Cross multiply
    651.87x = 976.89 × 489.45
  4. Step 4: Simplify right side
    651.87x = 478,138.81
  5. Step 5: Solve for x
    x = 478,138.81/651.87
  6. Step 6: Final answer
    x = 733.49

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.