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Finding the Fourth Proportional to 2,887.46, 4,330.74 and 939.65

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Solution

The fourth proportional to 2,887.46, 4,330.74 and 939.65 is: 1,409.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.46 : 4,330.74 = 939.65 : x
  2. Step 2: Convert to fraction form
    2,887.46/4,330.74 = 939.65/x
  3. Step 3: Cross multiply
    2,887.46x = 4,330.74 × 939.65
  4. Step 4: Simplify right side
    2,887.46x = 4,069,379.84
  5. Step 5: Solve for x
    x = 4,069,379.84/2,887.46
  6. Step 6: Final answer
    x = 1,409.33

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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.