Home / 766,143.83-1,148,816.67-285,976.76

Finding the Fourth Proportional to 766,143.83, 1,148,816.67 and 285,976.76

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Solution

The fourth proportional to 766,143.83, 1,148,816.67 and 285,976.76 is: 428,816.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,143.83 : 1,148,816.67 = 285,976.76 : x
  2. Step 2: Convert to fraction form
    766,143.83/1,148,816.67 = 285,976.76/x
  3. Step 3: Cross multiply
    766,143.83x = 1,148,816.67 × 285,976.76
  4. Step 4: Simplify right side
    766,143.83x = 328,534,873,065.04
  5. Step 5: Solve for x
    x = 328,534,873,065.04/766,143.83
  6. Step 6: Final answer
    x = 428,816.18

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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.