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Finding the Fourth Proportional to 330,641.28, 495,664.65 and 120,132

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Solution

The fourth proportional to 330,641.28, 495,664.65 and 120,132 is: 180,089.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,641.28 : 495,664.65 = 120,132 : x
  2. Step 2: Convert to fraction form
    330,641.28/495,664.65 = 120,132/x
  3. Step 3: Cross multiply
    330,641.28x = 495,664.65 × 120,132
  4. Step 4: Simplify right side
    330,641.28x = 59,545,185,733.80
  5. Step 5: Solve for x
    x = 59,545,185,733.80/330,641.28
  6. Step 6: Final answer
    x = 180,089.99

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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.