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Finding the Fourth Proportional to 1,283.65, 1,926.55 and 635.11

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Solution

The fourth proportional to 1,283.65, 1,926.55 and 635.11 is: 953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.65 : 1,926.55 = 635.11 : x
  2. Step 2: Convert to fraction form
    1,283.65/1,926.55 = 635.11/x
  3. Step 3: Cross multiply
    1,283.65x = 1,926.55 × 635.11
  4. Step 4: Simplify right side
    1,283.65x = 1,223,571.17
  5. Step 5: Solve for x
    x = 1,223,571.17/1,283.65
  6. Step 6: Final answer
    x = 953.20

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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.