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Finding the Fourth Proportional to 384,171.95, 530,119.38 and 212,078.73

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Solution

The fourth proportional to 384,171.95, 530,119.38 and 212,078.73 is: 292,647.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,171.95 : 530,119.38 = 212,078.73 : x
  2. Step 2: Convert to fraction form
    384,171.95/530,119.38 = 212,078.73/x
  3. Step 3: Cross multiply
    384,171.95x = 530,119.38 × 212,078.73
  4. Step 4: Simplify right side
    384,171.95x = 112,427,044,858.79
  5. Step 5: Solve for x
    x = 112,427,044,858.79/384,171.95
  6. Step 6: Final answer
    x = 292,647.72

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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.