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Finding the Fourth Proportional to 328,221.60, 492,332.40 and 217,413.60

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Solution

The fourth proportional to 328,221.60, 492,332.40 and 217,413.60 is: 326,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,221.60 : 492,332.40 = 217,413.60 : x
  2. Step 2: Convert to fraction form
    328,221.60/492,332.40 = 217,413.60/x
  3. Step 3: Cross multiply
    328,221.60x = 492,332.40 × 217,413.60
  4. Step 4: Simplify right side
    328,221.60x = 107,039,759,480.64
  5. Step 5: Solve for x
    x = 107,039,759,480.64/328,221.60
  6. Step 6: Final answer
    x = 326,120.40

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1.5x scale

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.