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Finding the Fourth Proportional to 636,978,044.82, 878,576,904.44 and 425,178,089.04

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Solution

The fourth proportional to 636,978,044.82, 878,576,904.44 and 425,178,089.04 is: 586,443,523.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,978,044.82 : 878,576,904.44 = 425,178,089.04 : x
  2. Step 2: Convert to fraction form
    636,978,044.82/878,576,904.44 = 425,178,089.04/x
  3. Step 3: Cross multiply
    636,978,044.82x = 878,576,904.44 × 425,178,089.04
  4. Step 4: Simplify right side
    636,978,044.82x = 373,551,649,304,477,952
  5. Step 5: Solve for x
    x = 373,551,649,304,477,952/636,978,044.82
  6. Step 6: Final answer
    x = 586,443,523.98

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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.