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Finding the Fourth Proportional to 490,639.32, 677,101.46 and 275,778.72

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Solution

The fourth proportional to 490,639.32, 677,101.46 and 275,778.72 is: 380,585.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,639.32 : 677,101.46 = 275,778.72 : x
  2. Step 2: Convert to fraction form
    490,639.32/677,101.46 = 275,778.72/x
  3. Step 3: Cross multiply
    490,639.32x = 677,101.46 × 275,778.72
  4. Step 4: Simplify right side
    490,639.32x = 186,730,172,570.04
  5. Step 5: Solve for x
    x = 186,730,172,570.04/490,639.32
  6. Step 6: Final answer
    x = 380,585.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.