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Finding the Fourth Proportional to 408,815,872.20, 612,373,502.70 and 340,791,424.20

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Solution

The fourth proportional to 408,815,872.20, 612,373,502.70 and 340,791,424.20 is: 510,478,316.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,815,872.20 : 612,373,502.70 = 340,791,424.20 : x
  2. Step 2: Convert to fraction form
    408,815,872.20/612,373,502.70 = 340,791,424.20/x
  3. Step 3: Cross multiply
    408,815,872.20x = 612,373,502.70 × 340,791,424.20
  4. Step 4: Simplify right side
    408,815,872.20x = 208,691,638,127,475,552
  5. Step 5: Solve for x
    x = 208,691,638,127,475,552/408,815,872.20
  6. Step 6: Final answer
    x = 510,478,316.32

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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.