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Finding the Fourth Proportional to 378,635.58, 522,553.68 and 282,976.20

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Solution

The fourth proportional to 378,635.58, 522,553.68 and 282,976.20 is: 390,534.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,635.58 : 522,553.68 = 282,976.20 : x
  2. Step 2: Convert to fraction form
    378,635.58/522,553.68 = 282,976.20/x
  3. Step 3: Cross multiply
    378,635.58x = 522,553.68 × 282,976.20
  4. Step 4: Simplify right side
    378,635.58x = 147,870,254,662.42
  5. Step 5: Solve for x
    x = 147,870,254,662.42/378,635.58
  6. Step 6: Final answer
    x = 390,534.49

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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.