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Finding the Fourth Proportional to 869,721.12, 1,305,027 and 396,345.60

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Solution

The fourth proportional to 869,721.12, 1,305,027 and 396,345.60 is: 594,721.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,721.12 : 1,305,027 = 396,345.60 : x
  2. Step 2: Convert to fraction form
    869,721.12/1,305,027 = 396,345.60/x
  3. Step 3: Cross multiply
    869,721.12x = 1,305,027 × 396,345.60
  4. Step 4: Simplify right side
    869,721.12x = 517,241,709,331.20
  5. Step 5: Solve for x
    x = 517,241,709,331.20/869,721.12
  6. Step 6: Final answer
    x = 594,721.34

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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.