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Finding the Fourth Proportional to 906.16, 1,250.50 and 492.16

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Solution

The fourth proportional to 906.16, 1,250.50 and 492.16 is: 679.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.16 : 1,250.50 = 492.16 : x
  2. Step 2: Convert to fraction form
    906.16/1,250.50 = 492.16/x
  3. Step 3: Cross multiply
    906.16x = 1,250.50 × 492.16
  4. Step 4: Simplify right side
    906.16x = 615,446.08
  5. Step 5: Solve for x
    x = 615,446.08/906.16
  6. Step 6: Final answer
    x = 679.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.