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Finding the Fourth Proportional to 305,319.80, 457,979.70 and 263,329.40

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Solution

The fourth proportional to 305,319.80, 457,979.70 and 263,329.40 is: 394,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,319.80 : 457,979.70 = 263,329.40 : x
  2. Step 2: Convert to fraction form
    305,319.80/457,979.70 = 263,329.40/x
  3. Step 3: Cross multiply
    305,319.80x = 457,979.70 × 263,329.40
  4. Step 4: Simplify right side
    305,319.80x = 120,599,519,613.18
  5. Step 5: Solve for x
    x = 120,599,519,613.18/305,319.80
  6. Step 6: Final answer
    x = 394,994.10

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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.