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Finding the Fourth Proportional to 330,313.76, 495,302.88 and 140,700.80

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Solution

The fourth proportional to 330,313.76, 495,302.88 and 140,700.80 is: 210,979.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,313.76 : 495,302.88 = 140,700.80 : x
  2. Step 2: Convert to fraction form
    330,313.76/495,302.88 = 140,700.80/x
  3. Step 3: Cross multiply
    330,313.76x = 495,302.88 × 140,700.80
  4. Step 4: Simplify right side
    330,313.76x = 69,689,511,458.30
  5. Step 5: Solve for x
    x = 69,689,511,458.30/330,313.76
  6. Step 6: Final answer
    x = 210,979.74

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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.