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Finding the Fourth Proportional to 620,760.10, 930,921.45 and 221,413.90

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Solution

The fourth proportional to 620,760.10, 930,921.45 and 221,413.90 is: 332,042.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,760.10 : 930,921.45 = 221,413.90 : x
  2. Step 2: Convert to fraction form
    620,760.10/930,921.45 = 221,413.90/x
  3. Step 3: Cross multiply
    620,760.10x = 930,921.45 × 221,413.90
  4. Step 4: Simplify right side
    620,760.10x = 206,118,948,838.16
  5. Step 5: Solve for x
    x = 206,118,948,838.16/620,760.10
  6. Step 6: Final answer
    x = 332,042.84

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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.