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Finding the Fourth Proportional to 993,951,265.20, 1,490,926,897.80 and 987,904,647.60

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Solution

The fourth proportional to 993,951,265.20, 1,490,926,897.80 and 987,904,647.60 is: 1,481,856,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,951,265.20 : 1,490,926,897.80 = 987,904,647.60 : x
  2. Step 2: Convert to fraction form
    993,951,265.20/1,490,926,897.80 = 987,904,647.60/x
  3. Step 3: Cross multiply
    993,951,265.20x = 1,490,926,897.80 × 987,904,647.60
  4. Step 4: Simplify right side
    993,951,265.20x = 1,472,893,611,568,470,272
  5. Step 5: Solve for x
    x = 1,472,893,611,568,470,272/993,951,265.20
  6. Step 6: Final answer
    x = 1,481,856,971.40

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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.