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Finding the Fourth Proportional to 1,042.89, 1,563.91 and 522.70

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Solution

The fourth proportional to 1,042.89, 1,563.91 and 522.70 is: 783.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.89 : 1,563.91 = 522.70 : x
  2. Step 2: Convert to fraction form
    1,042.89/1,563.91 = 522.70/x
  3. Step 3: Cross multiply
    1,042.89x = 1,563.91 × 522.70
  4. Step 4: Simplify right side
    1,042.89x = 817,455.76
  5. Step 5: Solve for x
    x = 817,455.76/1,042.89
  6. Step 6: Final answer
    x = 783.84

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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.