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Finding the Fourth Proportional to 326,028.40, 489,042.60 and 148,881.40

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Solution

The fourth proportional to 326,028.40, 489,042.60 and 148,881.40 is: 223,322.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,028.40 : 489,042.60 = 148,881.40 : x
  2. Step 2: Convert to fraction form
    326,028.40/489,042.60 = 148,881.40/x
  3. Step 3: Cross multiply
    326,028.40x = 489,042.60 × 148,881.40
  4. Step 4: Simplify right side
    326,028.40x = 72,809,346,947.64
  5. Step 5: Solve for x
    x = 72,809,346,947.64/326,028.40
  6. Step 6: Final answer
    x = 223,322.10

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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.