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Finding the Fourth Proportional to 709,012.72, 978,413.52 and 422,384.32

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Solution

The fourth proportional to 709,012.72, 978,413.52 and 422,384.32 is: 582,876.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,012.72 : 978,413.52 = 422,384.32 : x
  2. Step 2: Convert to fraction form
    709,012.72/978,413.52 = 422,384.32/x
  3. Step 3: Cross multiply
    709,012.72x = 978,413.52 × 422,384.32
  4. Step 4: Simplify right side
    709,012.72x = 413,266,529,324.01
  5. Step 5: Solve for x
    x = 413,266,529,324.01/709,012.72
  6. Step 6: Final answer
    x = 582,876.04

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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.