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Finding the Fourth Proportional to 2,986.65, 4,480.16 and 906.68

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Solution

The fourth proportional to 2,986.65, 4,480.16 and 906.68 is: 1,360.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.65 : 4,480.16 = 906.68 : x
  2. Step 2: Convert to fraction form
    2,986.65/4,480.16 = 906.68/x
  3. Step 3: Cross multiply
    2,986.65x = 4,480.16 × 906.68
  4. Step 4: Simplify right side
    2,986.65x = 4,062,044.53
  5. Step 5: Solve for x
    x = 4,062,044.53/2,986.65
  6. Step 6: Final answer
    x = 1,360.07

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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.