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Finding the Fourth Proportional to 1,318,896.60, 1,978,863.30 and 520,042.20

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Solution

The fourth proportional to 1,318,896.60, 1,978,863.30 and 520,042.20 is: 780,267.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,896.60 : 1,978,863.30 = 520,042.20 : x
  2. Step 2: Convert to fraction form
    1,318,896.60/1,978,863.30 = 520,042.20/x
  3. Step 3: Cross multiply
    1,318,896.60x = 1,978,863.30 × 520,042.20
  4. Step 4: Simplify right side
    1,318,896.60x = 1,029,092,424,031.26
  5. Step 5: Solve for x
    x = 1,029,092,424,031.26/1,318,896.60
  6. Step 6: Final answer
    x = 780,267.71

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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.