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Finding the Fourth Proportional to 384,111.78, 530,074.35 and 212,029.84

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Solution

The fourth proportional to 384,111.78, 530,074.35 and 212,029.84 is: 292,601.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,111.78 : 530,074.35 = 212,029.84 : x
  2. Step 2: Convert to fraction form
    384,111.78/530,074.35 = 212,029.84/x
  3. Step 3: Cross multiply
    384,111.78x = 530,074.35 × 212,029.84
  4. Step 4: Simplify right side
    384,111.78x = 112,391,579,618.60
  5. Step 5: Solve for x
    x = 112,391,579,618.60/384,111.78
  6. Step 6: Final answer
    x = 292,601.23

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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.