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Finding the Fourth Proportional to 374,426.40, 561,639.60 and 330,139.65

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Solution

The fourth proportional to 374,426.40, 561,639.60 and 330,139.65 is: 495,209.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,426.40 : 561,639.60 = 330,139.65 : x
  2. Step 2: Convert to fraction form
    374,426.40/561,639.60 = 330,139.65/x
  3. Step 3: Cross multiply
    374,426.40x = 561,639.60 × 330,139.65
  4. Step 4: Simplify right side
    374,426.40x = 185,419,500,970.14
  5. Step 5: Solve for x
    x = 185,419,500,970.14/374,426.40
  6. Step 6: Final answer
    x = 495,209.48

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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.