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Finding the Fourth Proportional to 1,397.53, 2,094.94 and 519.78

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Solution

The fourth proportional to 1,397.53, 2,094.94 and 519.78 is: 779.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.53 : 2,094.94 = 519.78 : x
  2. Step 2: Convert to fraction form
    1,397.53/2,094.94 = 519.78/x
  3. Step 3: Cross multiply
    1,397.53x = 2,094.94 × 519.78
  4. Step 4: Simplify right side
    1,397.53x = 1,088,905.31
  5. Step 5: Solve for x
    x = 1,088,905.31/1,397.53
  6. Step 6: Final answer
    x = 779.17

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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.