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Finding the Fourth Proportional to 559,917,712.80, 839,876,569.20 and 478,288,375.20

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Solution

The fourth proportional to 559,917,712.80, 839,876,569.20 and 478,288,375.20 is: 717,432,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,917,712.80 : 839,876,569.20 = 478,288,375.20 : x
  2. Step 2: Convert to fraction form
    559,917,712.80/839,876,569.20 = 478,288,375.20/x
  3. Step 3: Cross multiply
    559,917,712.80x = 839,876,569.20 × 478,288,375.20
  4. Step 4: Simplify right side
    559,917,712.80x = 401,703,199,651,218,368
  5. Step 5: Solve for x
    x = 401,703,199,651,218,368/559,917,712.80
  6. Step 6: Final answer
    x = 717,432,562.80

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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.