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Finding the Fourth Proportional to 398,604,908.70, 597,907,363.05 and 355,522,758.30

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Solution

The fourth proportional to 398,604,908.70, 597,907,363.05 and 355,522,758.30 is: 533,284,137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,604,908.70 : 597,907,363.05 = 355,522,758.30 : x
  2. Step 2: Convert to fraction form
    398,604,908.70/597,907,363.05 = 355,522,758.30/x
  3. Step 3: Cross multiply
    398,604,908.70x = 597,907,363.05 × 355,522,758.30
  4. Step 4: Simplify right side
    398,604,908.70x = 212,569,674,919,415,488
  5. Step 5: Solve for x
    x = 212,569,674,919,415,488/398,604,908.70
  6. Step 6: Final answer
    x = 533,284,137.45

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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.