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Finding the Fourth Proportional to 709,169.37, 978,652.44 and 386,879.48

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Solution

The fourth proportional to 709,169.37, 978,652.44 and 386,879.48 is: 533,892.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,169.37 : 978,652.44 = 386,879.48 : x
  2. Step 2: Convert to fraction form
    709,169.37/978,652.44 = 386,879.48/x
  3. Step 3: Cross multiply
    709,169.37x = 978,652.44 × 386,879.48
  4. Step 4: Simplify right side
    709,169.37x = 378,620,547,087.93
  5. Step 5: Solve for x
    x = 378,620,547,087.93/709,169.37
  6. Step 6: Final answer
    x = 533,892.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.