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Finding the Fourth Proportional to 326,086.40, 489,129.60 and 219,798.20

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Solution

The fourth proportional to 326,086.40, 489,129.60 and 219,798.20 is: 329,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,086.40 : 489,129.60 = 219,798.20 : x
  2. Step 2: Convert to fraction form
    326,086.40/489,129.60 = 219,798.20/x
  3. Step 3: Cross multiply
    326,086.40x = 489,129.60 × 219,798.20
  4. Step 4: Simplify right side
    326,086.40x = 107,509,805,646.72
  5. Step 5: Solve for x
    x = 107,509,805,646.72/326,086.40
  6. Step 6: Final answer
    x = 329,697.30

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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.