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Finding the Fourth Proportional to 3,330.05, 4,994.63 and 865.01

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Solution

The fourth proportional to 3,330.05, 4,994.63 and 865.01 is: 1,297.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,330.05 : 4,994.63 = 865.01 : x
  2. Step 2: Convert to fraction form
    3,330.05/4,994.63 = 865.01/x
  3. Step 3: Cross multiply
    3,330.05x = 4,994.63 × 865.01
  4. Step 4: Simplify right side
    3,330.05x = 4,320,416.30
  5. Step 5: Solve for x
    x = 4,320,416.30/3,330.05
  6. Step 6: Final answer
    x = 1,297.40

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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.