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Finding the Fourth Proportional to 378,330.36, 522,069.72 and 212,783.10

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Solution

The fourth proportional to 378,330.36, 522,069.72 and 212,783.10 is: 293,625.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,330.36 : 522,069.72 = 212,783.10 : x
  2. Step 2: Convert to fraction form
    378,330.36/522,069.72 = 212,783.10/x
  3. Step 3: Cross multiply
    378,330.36x = 522,069.72 × 212,783.10
  4. Step 4: Simplify right side
    378,330.36x = 111,087,613,437.73
  5. Step 5: Solve for x
    x = 111,087,613,437.73/378,330.36
  6. Step 6: Final answer
    x = 293,625.96

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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.