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Finding the Fourth Proportional to 330,923.80, 496,385.70 and 278,435.80

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Solution

The fourth proportional to 330,923.80, 496,385.70 and 278,435.80 is: 417,653.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,923.80 : 496,385.70 = 278,435.80 : x
  2. Step 2: Convert to fraction form
    330,923.80/496,385.70 = 278,435.80/x
  3. Step 3: Cross multiply
    330,923.80x = 496,385.70 × 278,435.80
  4. Step 4: Simplify right side
    330,923.80x = 138,211,549,488.06
  5. Step 5: Solve for x
    x = 138,211,549,488.06/330,923.80
  6. Step 6: Final answer
    x = 417,653.70

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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.