Home / 457,868,123.22-687,084,679.69-212,178,963.12

Finding the Fourth Proportional to 457,868,123.22, 687,084,679.69 and 212,178,963.12

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Solution

The fourth proportional to 457,868,123.22, 687,084,679.69 and 212,178,963.12 is: 318,399,354.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,868,123.22 : 687,084,679.69 = 212,178,963.12 : x
  2. Step 2: Convert to fraction form
    457,868,123.22/687,084,679.69 = 212,178,963.12/x
  3. Step 3: Cross multiply
    457,868,123.22x = 687,084,679.69 × 212,178,963.12
  4. Step 4: Simplify right side
    457,868,123.22x = 145,784,914,908,826,112
  5. Step 5: Solve for x
    x = 145,784,914,908,826,112/457,868,123.22
  6. Step 6: Final answer
    x = 318,399,354.56

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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.