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Finding the Fourth Proportional to 1,521.91, 2,282.64 and 426.30

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Solution

The fourth proportional to 1,521.91, 2,282.64 and 426.30 is: 639.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.91 : 2,282.64 = 426.30 : x
  2. Step 2: Convert to fraction form
    1,521.91/2,282.64 = 426.30/x
  3. Step 3: Cross multiply
    1,521.91x = 2,282.64 × 426.30
  4. Step 4: Simplify right side
    1,521.91x = 973,089.43
  5. Step 5: Solve for x
    x = 973,089.43/1,521.91
  6. Step 6: Final answer
    x = 639.39

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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.