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Finding the Fourth Proportional to 603,835,221.40, 905,752,832.10 and 386,156,987.80

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Solution

The fourth proportional to 603,835,221.40, 905,752,832.10 and 386,156,987.80 is: 579,235,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,835,221.40 : 905,752,832.10 = 386,156,987.80 : x
  2. Step 2: Convert to fraction form
    603,835,221.40/905,752,832.10 = 386,156,987.80/x
  3. Step 3: Cross multiply
    603,835,221.40x = 905,752,832.10 × 386,156,987.80
  4. Step 4: Simplify right side
    603,835,221.40x = 349,762,785,335,055,168
  5. Step 5: Solve for x
    x = 349,762,785,335,055,168/603,835,221.40
  6. Step 6: Final answer
    x = 579,235,481.70

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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.