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Finding the Fourth Proportional to 384,722.13, 530,900.03 and 212,631.20

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Solution

The fourth proportional to 384,722.13, 530,900.03 and 212,631.20 is: 293,421.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,722.13 : 530,900.03 = 212,631.20 : x
  2. Step 2: Convert to fraction form
    384,722.13/530,900.03 = 212,631.20/x
  3. Step 3: Cross multiply
    384,722.13x = 530,900.03 × 212,631.20
  4. Step 4: Simplify right side
    384,722.13x = 112,885,910,458.94
  5. Step 5: Solve for x
    x = 112,885,910,458.94/384,722.13
  6. Step 6: Final answer
    x = 293,421.93

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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.