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Finding the Fourth Proportional to 408,097.80, 612,146.70 and 314,785.80

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Solution

The fourth proportional to 408,097.80, 612,146.70 and 314,785.80 is: 472,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,097.80 : 612,146.70 = 314,785.80 : x
  2. Step 2: Convert to fraction form
    408,097.80/612,146.70 = 314,785.80/x
  3. Step 3: Cross multiply
    408,097.80x = 612,146.70 × 314,785.80
  4. Step 4: Simplify right side
    408,097.80x = 192,695,088,676.86
  5. Step 5: Solve for x
    x = 192,695,088,676.86/408,097.80
  6. Step 6: Final answer
    x = 472,178.70

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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.