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Finding the Fourth Proportional to 1,286.25, 1,929.13 and 627.47

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Solution

The fourth proportional to 1,286.25, 1,929.13 and 627.47 is: 941.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.25 : 1,929.13 = 627.47 : x
  2. Step 2: Convert to fraction form
    1,286.25/1,929.13 = 627.47/x
  3. Step 3: Cross multiply
    1,286.25x = 1,929.13 × 627.47
  4. Step 4: Simplify right side
    1,286.25x = 1,210,458.42
  5. Step 5: Solve for x
    x = 1,210,458.42/1,286.25
  6. Step 6: Final answer
    x = 941.08

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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.