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Finding the Fourth Proportional to 684,180.78, 944,128.79 and 378,238.83

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Solution

The fourth proportional to 684,180.78, 944,128.79 and 378,238.83 is: 521,947.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,180.78 : 944,128.79 = 378,238.83 : x
  2. Step 2: Convert to fraction form
    684,180.78/944,128.79 = 378,238.83/x
  3. Step 3: Cross multiply
    684,180.78x = 944,128.79 × 378,238.83
  4. Step 4: Simplify right side
    684,180.78x = 357,106,172,323.95
  5. Step 5: Solve for x
    x = 357,106,172,323.95/684,180.78
  6. Step 6: Final answer
    x = 521,947.10

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.