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Finding the Fourth Proportional to 706,446,877.76, 974,879,486.10 and 388,904,542.82

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Solution

The fourth proportional to 706,446,877.76, 974,879,486.10 and 388,904,542.82 is: 536,678,797.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,446,877.76 : 974,879,486.10 = 388,904,542.82 : x
  2. Step 2: Convert to fraction form
    706,446,877.76/974,879,486.10 = 388,904,542.82/x
  3. Step 3: Cross multiply
    706,446,877.76x = 974,879,486.10 × 388,904,542.82
  4. Step 4: Simplify right side
    706,446,877.76x = 379,135,060,841,442,624
  5. Step 5: Solve for x
    x = 379,135,060,841,442,624/706,446,877.76
  6. Step 6: Final answer
    x = 536,678,797.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.