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Finding the Fourth Proportional to 4,839.70, 7,260 and 1,719.40

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Solution

The fourth proportional to 4,839.70, 7,260 and 1,719.40 is: 2,579.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,839.70 : 7,260 = 1,719.40 : x
  2. Step 2: Convert to fraction form
    4,839.70/7,260 = 1,719.40/x
  3. Step 3: Cross multiply
    4,839.70x = 7,260 × 1,719.40
  4. Step 4: Simplify right side
    4,839.70x = 12,482,844
  5. Step 5: Solve for x
    x = 12,482,844/4,839.70
  6. Step 6: Final answer
    x = 2,579.26

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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.