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Finding the Fourth Proportional to 1,253.68, 1,878.90 and 522.26

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Solution

The fourth proportional to 1,253.68, 1,878.90 and 522.26 is: 782.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.68 : 1,878.90 = 522.26 : x
  2. Step 2: Convert to fraction form
    1,253.68/1,878.90 = 522.26/x
  3. Step 3: Cross multiply
    1,253.68x = 1,878.90 × 522.26
  4. Step 4: Simplify right side
    1,253.68x = 981,274.31
  5. Step 5: Solve for x
    x = 981,274.31/1,253.68
  6. Step 6: Final answer
    x = 782.72

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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.