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Finding the Fourth Proportional to 906.66, 1,360.78 and 474.12

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Solution

The fourth proportional to 906.66, 1,360.78 and 474.12 is: 711.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.66 : 1,360.78 = 474.12 : x
  2. Step 2: Convert to fraction form
    906.66/1,360.78 = 474.12/x
  3. Step 3: Cross multiply
    906.66x = 1,360.78 × 474.12
  4. Step 4: Simplify right side
    906.66x = 645,173.01
  5. Step 5: Solve for x
    x = 645,173.01/906.66
  6. Step 6: Final answer
    x = 711.59

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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.