Home / 457,868,122.72-687,084,678.94-212,178,962.62

Finding the Fourth Proportional to 457,868,122.72, 687,084,678.94 and 212,178,962.62

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Solution

The fourth proportional to 457,868,122.72, 687,084,678.94 and 212,178,962.62 is: 318,399,353.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,868,122.72 : 687,084,678.94 = 212,178,962.62 : x
  2. Step 2: Convert to fraction form
    457,868,122.72/687,084,678.94 = 212,178,962.62/x
  3. Step 3: Cross multiply
    457,868,122.72x = 687,084,678.94 × 212,178,962.62
  4. Step 4: Simplify right side
    457,868,122.72x = 145,784,914,406,149,568
  5. Step 5: Solve for x
    x = 145,784,914,406,149,568/457,868,122.72
  6. Step 6: Final answer
    x = 318,399,353.81

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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.