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Finding the Fourth Proportional to 436,413.20, 654,490.20 and 170,020.40

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Solution

The fourth proportional to 436,413.20, 654,490.20 and 170,020.40 is: 254,980.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,413.20 : 654,490.20 = 170,020.40 : x
  2. Step 2: Convert to fraction form
    436,413.20/654,490.20 = 170,020.40/x
  3. Step 3: Cross multiply
    436,413.20x = 654,490.20 × 170,020.40
  4. Step 4: Simplify right side
    436,413.20x = 111,276,685,600.08
  5. Step 5: Solve for x
    x = 111,276,685,600.08/436,413.20
  6. Step 6: Final answer
    x = 254,980.11

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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.