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Finding the Fourth Proportional to 555,439.20, 766,504.57 and 300,790.32

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Solution

The fourth proportional to 555,439.20, 766,504.57 and 300,790.32 is: 415,089.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,439.20 : 766,504.57 = 300,790.32 : x
  2. Step 2: Convert to fraction form
    555,439.20/766,504.57 = 300,790.32/x
  3. Step 3: Cross multiply
    555,439.20x = 766,504.57 × 300,790.32
  4. Step 4: Simplify right side
    555,439.20x = 230,557,154,891.76
  5. Step 5: Solve for x
    x = 230,557,154,891.76/555,439.20
  6. Step 6: Final answer
    x = 415,089.82

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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.