Home / 427,507,923.80-640,758,000.90-319,676,576.60

Finding the Fourth Proportional to 427,507,923.80, 640,758,000.90 and 319,676,576.60

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Solution

The fourth proportional to 427,507,923.80, 640,758,000.90 and 319,676,576.60 is: 479,138,076.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,507,923.80 : 640,758,000.90 = 319,676,576.60 : x
  2. Step 2: Convert to fraction form
    427,507,923.80/640,758,000.90 = 319,676,576.60/x
  3. Step 3: Cross multiply
    427,507,923.80x = 640,758,000.90 × 319,676,576.60
  4. Step 4: Simplify right side
    427,507,923.80x = 204,835,324,156,771,712
  5. Step 5: Solve for x
    x = 204,835,324,156,771,712/427,507,923.80
  6. Step 6: Final answer
    x = 479,138,076.17

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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.