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Finding the Fourth Proportional to 324,413.20, 486,389.40 and 124,656.40

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Solution

The fourth proportional to 324,413.20, 486,389.40 and 124,656.40 is: 186,896.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,413.20 : 486,389.40 = 124,656.40 : x
  2. Step 2: Convert to fraction form
    324,413.20/486,389.40 = 124,656.40/x
  3. Step 3: Cross multiply
    324,413.20x = 486,389.40 × 124,656.40
  4. Step 4: Simplify right side
    324,413.20x = 60,631,551,602.16
  5. Step 5: Solve for x
    x = 60,631,551,602.16/324,413.20
  6. Step 6: Final answer
    x = 186,896.07

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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.