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Finding the Fourth Proportional to 1,503.78, 2,255.37 and 1,019.58

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Solution

The fourth proportional to 1,503.78, 2,255.37 and 1,019.58 is: 1,529.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.78 : 2,255.37 = 1,019.58 : x
  2. Step 2: Convert to fraction form
    1,503.78/2,255.37 = 1,019.58/x
  3. Step 3: Cross multiply
    1,503.78x = 2,255.37 × 1,019.58
  4. Step 4: Simplify right side
    1,503.78x = 2,299,530.14
  5. Step 5: Solve for x
    x = 2,299,530.14/1,503.78
  6. Step 6: Final answer
    x = 1,529.17

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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.