Home / 920,395.20-1,380,789.92-521,224.64

Finding the Fourth Proportional to 920,395.20, 1,380,789.92 and 521,224.64

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Solution

The fourth proportional to 920,395.20, 1,380,789.92 and 521,224.64 is: 781,948.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,395.20 : 1,380,789.92 = 521,224.64 : x
  2. Step 2: Convert to fraction form
    920,395.20/1,380,789.92 = 521,224.64/x
  3. Step 3: Cross multiply
    920,395.20x = 1,380,789.92 × 521,224.64
  4. Step 4: Simplify right side
    920,395.20x = 719,701,728,967.63
  5. Step 5: Solve for x
    x = 719,701,728,967.63/920,395.20
  6. Step 6: Final answer
    x = 781,948.59

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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.