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Finding the Fourth Proportional to 551,872,472.60, 827,808,708.90 and 379,879,794.20

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Solution

The fourth proportional to 551,872,472.60, 827,808,708.90 and 379,879,794.20 is: 569,819,691.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,872,472.60 : 827,808,708.90 = 379,879,794.20 : x
  2. Step 2: Convert to fraction form
    551,872,472.60/827,808,708.90 = 379,879,794.20/x
  3. Step 3: Cross multiply
    551,872,472.60x = 827,808,708.90 × 379,879,794.20
  4. Step 4: Simplify right side
    551,872,472.60x = 314,467,801,973,899,712
  5. Step 5: Solve for x
    x = 314,467,801,973,899,712/551,872,472.60
  6. Step 6: Final answer
    x = 569,819,691.30

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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.