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Finding the Fourth Proportional to 1,559.48, 2,338.70 and 519.28

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Solution

The fourth proportional to 1,559.48, 2,338.70 and 519.28 is: 778.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.48 : 2,338.70 = 519.28 : x
  2. Step 2: Convert to fraction form
    1,559.48/2,338.70 = 519.28/x
  3. Step 3: Cross multiply
    1,559.48x = 2,338.70 × 519.28
  4. Step 4: Simplify right side
    1,559.48x = 1,214,440.14
  5. Step 5: Solve for x
    x = 1,214,440.14/1,559.48
  6. Step 6: Final answer
    x = 778.75

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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.