Home / 766,143.65-1,148,816.39-285,976.58

Finding the Fourth Proportional to 766,143.65, 1,148,816.39 and 285,976.58

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Solution

The fourth proportional to 766,143.65, 1,148,816.39 and 285,976.58 is: 428,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,143.65 : 1,148,816.39 = 285,976.58 : x
  2. Step 2: Convert to fraction form
    766,143.65/1,148,816.39 = 285,976.58/x
  3. Step 3: Cross multiply
    766,143.65x = 1,148,816.39 × 285,976.58
  4. Step 4: Simplify right side
    766,143.65x = 328,534,577,231.01
  5. Step 5: Solve for x
    x = 328,534,577,231.01/766,143.65
  6. Step 6: Final answer
    x = 428,815.90

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Double scale
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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.