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Finding the Fourth Proportional to 561,931,391.49, 775,448,485.43 and 311,046,067.00

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Solution

The fourth proportional to 561,931,391.49, 775,448,485.43 and 311,046,067.00 is: 429,234,253.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,931,391.49 : 775,448,485.43 = 311,046,067.00 : x
  2. Step 2: Convert to fraction form
    561,931,391.49/775,448,485.43 = 311,046,067.00/x
  3. Step 3: Cross multiply
    561,931,391.49x = 775,448,485.43 × 311,046,067.00
  4. Step 4: Simplify right side
    561,931,391.49x = 241,200,201,553,522,400
  5. Step 5: Solve for x
    x = 241,200,201,553,522,400/561,931,391.49
  6. Step 6: Final answer
    x = 429,234,253.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.