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Finding the Fourth Proportional to 1,013.51, 1,520.21 and 551.17

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Solution

The fourth proportional to 1,013.51, 1,520.21 and 551.17 is: 826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.51 : 1,520.21 = 551.17 : x
  2. Step 2: Convert to fraction form
    1,013.51/1,520.21 = 551.17/x
  3. Step 3: Cross multiply
    1,013.51x = 1,520.21 × 551.17
  4. Step 4: Simplify right side
    1,013.51x = 837,894.15
  5. Step 5: Solve for x
    x = 837,894.15/1,013.51
  6. Step 6: Final answer
    x = 826.73

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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.