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Finding the Fourth Proportional to 1,015.59, 1,522.25 and 431.08

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Solution

The fourth proportional to 1,015.59, 1,522.25 and 431.08 is: 646.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.59 : 1,522.25 = 431.08 : x
  2. Step 2: Convert to fraction form
    1,015.59/1,522.25 = 431.08/x
  3. Step 3: Cross multiply
    1,015.59x = 1,522.25 × 431.08
  4. Step 4: Simplify right side
    1,015.59x = 656,214.42
  5. Step 5: Solve for x
    x = 656,214.42/1,015.59
  6. Step 6: Final answer
    x = 646.14

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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.