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Finding the Fourth Proportional to 2,878.74, 4,319.19 and 1,147.50

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Solution

The fourth proportional to 2,878.74, 4,319.19 and 1,147.50 is: 1,721.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.74 : 4,319.19 = 1,147.50 : x
  2. Step 2: Convert to fraction form
    2,878.74/4,319.19 = 1,147.50/x
  3. Step 3: Cross multiply
    2,878.74x = 4,319.19 × 1,147.50
  4. Step 4: Simplify right side
    2,878.74x = 4,956,270.53
  5. Step 5: Solve for x
    x = 4,956,270.53/2,878.74
  6. Step 6: Final answer
    x = 1,721.68

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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.