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Finding the Fourth Proportional to 1,252.03, 1,878.21 and 522.13

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Solution

The fourth proportional to 1,252.03, 1,878.21 and 522.13 is: 783.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.03 : 1,878.21 = 522.13 : x
  2. Step 2: Convert to fraction form
    1,252.03/1,878.21 = 522.13/x
  3. Step 3: Cross multiply
    1,252.03x = 1,878.21 × 522.13
  4. Step 4: Simplify right side
    1,252.03x = 980,669.79
  5. Step 5: Solve for x
    x = 980,669.79/1,252.03
  6. Step 6: Final answer
    x = 783.26

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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.