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Finding the Fourth Proportional to 640,978,515.70, 961,467,773.55 and 634,176,070.90

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Solution

The fourth proportional to 640,978,515.70, 961,467,773.55 and 634,176,070.90 is: 951,264,106.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,978,515.70 : 961,467,773.55 = 634,176,070.90 : x
  2. Step 2: Convert to fraction form
    640,978,515.70/961,467,773.55 = 634,176,070.90/x
  3. Step 3: Cross multiply
    640,978,515.70x = 961,467,773.55 × 634,176,070.90
  4. Step 4: Simplify right side
    640,978,515.70x = 609,739,854,926,909,952
  5. Step 5: Solve for x
    x = 609,739,854,926,909,952/640,978,515.70
  6. Step 6: Final answer
    x = 951,264,106.35

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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.