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Finding the Fourth Proportional to 2,986.35, 4,479.93 and 906.12

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Solution

The fourth proportional to 2,986.35, 4,479.93 and 906.12 is: 1,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.35 : 4,479.93 = 906.12 : x
  2. Step 2: Convert to fraction form
    2,986.35/4,479.93 = 906.12/x
  3. Step 3: Cross multiply
    2,986.35x = 4,479.93 × 906.12
  4. Step 4: Simplify right side
    2,986.35x = 4,059,354.17
  5. Step 5: Solve for x
    x = 4,059,354.17/2,986.35
  6. Step 6: Final answer
    x = 1,359.30

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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.