Home / 442,638,288.20-664,146,389.10-212,488,905.80

Finding the Fourth Proportional to 442,638,288.20, 664,146,389.10 and 212,488,905.80

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Solution

The fourth proportional to 442,638,288.20, 664,146,389.10 and 212,488,905.80 is: 318,824,067.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,638,288.20 : 664,146,389.10 = 212,488,905.80 : x
  2. Step 2: Convert to fraction form
    442,638,288.20/664,146,389.10 = 212,488,905.80/x
  3. Step 3: Cross multiply
    442,638,288.20x = 664,146,389.10 × 212,488,905.80
  4. Step 4: Simplify right side
    442,638,288.20x = 141,123,739,510,880,064
  5. Step 5: Solve for x
    x = 141,123,739,510,880,064/442,638,288.20
  6. Step 6: Final answer
    x = 318,824,067.58

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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.