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Finding the Fourth Proportional to 326,200.10, 489,300.15 and 298,643.90

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Solution

The fourth proportional to 326,200.10, 489,300.15 and 298,643.90 is: 447,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,200.10 : 489,300.15 = 298,643.90 : x
  2. Step 2: Convert to fraction form
    326,200.10/489,300.15 = 298,643.90/x
  3. Step 3: Cross multiply
    326,200.10x = 489,300.15 × 298,643.90
  4. Step 4: Simplify right side
    326,200.10x = 146,126,505,066.59
  5. Step 5: Solve for x
    x = 146,126,505,066.59/326,200.10
  6. Step 6: Final answer
    x = 447,965.85

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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.