Home / 728,117.10-1,091,398.05-278,664.30

Finding the Fourth Proportional to 728,117.10, 1,091,398.05 and 278,664.30

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Solution

The fourth proportional to 728,117.10, 1,091,398.05 and 278,664.30 is: 417,698.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,117.10 : 1,091,398.05 = 278,664.30 : x
  2. Step 2: Convert to fraction form
    728,117.10/1,091,398.05 = 278,664.30/x
  3. Step 3: Cross multiply
    728,117.10x = 1,091,398.05 × 278,664.30
  4. Step 4: Simplify right side
    728,117.10x = 304,133,673,624.62
  5. Step 5: Solve for x
    x = 304,133,673,624.62/728,117.10
  6. Step 6: Final answer
    x = 417,698.85

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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.