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Finding the Fourth Proportional to 1,752.57, 2,628.45 and 519.69

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Solution

The fourth proportional to 1,752.57, 2,628.45 and 519.69 is: 779.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,752.57 : 2,628.45 = 519.69 : x
  2. Step 2: Convert to fraction form
    1,752.57/2,628.45 = 519.69/x
  3. Step 3: Cross multiply
    1,752.57x = 2,628.45 × 519.69
  4. Step 4: Simplify right side
    1,752.57x = 1,365,979.18
  5. Step 5: Solve for x
    x = 1,365,979.18/1,752.57
  6. Step 6: Final answer
    x = 779.41

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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.