Home / 442,638,288.70-664,146,389.85-212,488,906.30

Finding the Fourth Proportional to 442,638,288.70, 664,146,389.85 and 212,488,906.30

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Solution

The fourth proportional to 442,638,288.70, 664,146,389.85 and 212,488,906.30 is: 318,824,068.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,638,288.70 : 664,146,389.85 = 212,488,906.30 : x
  2. Step 2: Convert to fraction form
    442,638,288.70/664,146,389.85 = 212,488,906.30/x
  3. Step 3: Cross multiply
    442,638,288.70x = 664,146,389.85 × 212,488,906.30
  4. Step 4: Simplify right side
    442,638,288.70x = 141,123,740,002,319,936
  5. Step 5: Solve for x
    x = 141,123,740,002,319,936/442,638,288.70
  6. Step 6: Final answer
    x = 318,824,068.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.