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Finding the Fourth Proportional to 490,413.40, 676,824.06 and 299,426.20

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Solution

The fourth proportional to 490,413.40, 676,824.06 and 299,426.20 is: 413,240.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,413.40 : 676,824.06 = 299,426.20 : x
  2. Step 2: Convert to fraction form
    490,413.40/676,824.06 = 299,426.20/x
  3. Step 3: Cross multiply
    490,413.40x = 676,824.06 × 299,426.20
  4. Step 4: Simplify right side
    490,413.40x = 202,658,856,354.37
  5. Step 5: Solve for x
    x = 202,658,856,354.37/490,413.40
  6. Step 6: Final answer
    x = 413,240.86

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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.