Home / 457,868,123.70-687,084,680.40-212,178,963.59

Finding the Fourth Proportional to 457,868,123.70, 687,084,680.40 and 212,178,963.59

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Solution

The fourth proportional to 457,868,123.70, 687,084,680.40 and 212,178,963.59 is: 318,399,355.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,868,123.70 : 687,084,680.40 = 212,178,963.59 : x
  2. Step 2: Convert to fraction form
    457,868,123.70/687,084,680.40 = 212,178,963.59/x
  3. Step 3: Cross multiply
    457,868,123.70x = 687,084,680.40 × 212,178,963.59
  4. Step 4: Simplify right side
    457,868,123.70x = 145,784,915,384,183,872
  5. Step 5: Solve for x
    x = 145,784,915,384,183,872/457,868,123.70
  6. Step 6: Final answer
    x = 318,399,355.27

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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.