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Finding the Fourth Proportional to 355,919,228.70, 533,878,843.05 and 279,478,038.30

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Solution

The fourth proportional to 355,919,228.70, 533,878,843.05 and 279,478,038.30 is: 419,217,057.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,919,228.70 : 533,878,843.05 = 279,478,038.30 : x
  2. Step 2: Convert to fraction form
    355,919,228.70/533,878,843.05 = 279,478,038.30/x
  3. Step 3: Cross multiply
    355,919,228.70x = 533,878,843.05 × 279,478,038.30
  4. Step 4: Simplify right side
    355,919,228.70x = 149,207,411,745,487,584
  5. Step 5: Solve for x
    x = 149,207,411,745,487,584/355,919,228.70
  6. Step 6: Final answer
    x = 419,217,057.45

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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.