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Finding the Fourth Proportional to 372,345.44, 513,840.20 and 221,413.28

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Solution

The fourth proportional to 372,345.44, 513,840.20 and 221,413.28 is: 305,552.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,345.44 : 513,840.20 = 221,413.28 : x
  2. Step 2: Convert to fraction form
    372,345.44/513,840.20 = 221,413.28/x
  3. Step 3: Cross multiply
    372,345.44x = 513,840.20 × 221,413.28
  4. Step 4: Simplify right side
    372,345.44x = 113,771,044,077.86
  5. Step 5: Solve for x
    x = 113,771,044,077.86/372,345.44
  6. Step 6: Final answer
    x = 305,552.40

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1.5x scale

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.