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Finding the Fourth Proportional to 638,698,429.80, 958,047,644.70 and 624,349,522.80

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Solution

The fourth proportional to 638,698,429.80, 958,047,644.70 and 624,349,522.80 is: 936,524,284.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,698,429.80 : 958,047,644.70 = 624,349,522.80 : x
  2. Step 2: Convert to fraction form
    638,698,429.80/958,047,644.70 = 624,349,522.80/x
  3. Step 3: Cross multiply
    638,698,429.80x = 958,047,644.70 × 624,349,522.80
  4. Step 4: Simplify right side
    638,698,429.80x = 598,156,589,788,108,928
  5. Step 5: Solve for x
    x = 598,156,589,788,108,928/638,698,429.80
  6. Step 6: Final answer
    x = 936,524,284.20

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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.