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Finding the Fourth Proportional to 330,187.20, 495,280.80 and 328,218.90

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Solution

The fourth proportional to 330,187.20, 495,280.80 and 328,218.90 is: 492,328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,187.20 : 495,280.80 = 328,218.90 : x
  2. Step 2: Convert to fraction form
    330,187.20/495,280.80 = 328,218.90/x
  3. Step 3: Cross multiply
    330,187.20x = 495,280.80 × 328,218.90
  4. Step 4: Simplify right side
    330,187.20x = 162,560,519,367.12
  5. Step 5: Solve for x
    x = 162,560,519,367.12/330,187.20
  6. Step 6: Final answer
    x = 492,328.35

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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.