Home / 919,235.76-1,378,854.05-288,198.78

Finding the Fourth Proportional to 919,235.76, 1,378,854.05 and 288,198.78

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Solution

The fourth proportional to 919,235.76, 1,378,854.05 and 288,198.78 is: 432,298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,235.76 : 1,378,854.05 = 288,198.78 : x
  2. Step 2: Convert to fraction form
    919,235.76/1,378,854.05 = 288,198.78/x
  3. Step 3: Cross multiply
    919,235.76x = 1,378,854.05 × 288,198.78
  4. Step 4: Simplify right side
    919,235.76x = 397,384,053,567.07
  5. Step 5: Solve for x
    x = 397,384,053,567.07/919,235.76
  6. Step 6: Final answer
    x = 432,298.30

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Double scale
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Similar ratio
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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.