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Finding the Fourth Proportional to 326,886.20, 490,319.54 and 90,243.32

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Solution

The fourth proportional to 326,886.20, 490,319.54 and 90,243.32 is: 135,362.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,886.20 : 490,319.54 = 90,243.32 : x
  2. Step 2: Convert to fraction form
    326,886.20/490,319.54 = 90,243.32/x
  3. Step 3: Cross multiply
    326,886.20x = 490,319.54 × 90,243.32
  4. Step 4: Simplify right side
    326,886.20x = 44,248,063,150.47
  5. Step 5: Solve for x
    x = 44,248,063,150.47/326,886.20
  6. Step 6: Final answer
    x = 135,362.29

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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.