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Finding the Fourth Proportional to 622,921,764.60, 934,382,646.90 and 521,640,919.80

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Solution

The fourth proportional to 622,921,764.60, 934,382,646.90 and 521,640,919.80 is: 782,461,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,921,764.60 : 934,382,646.90 = 521,640,919.80 : x
  2. Step 2: Convert to fraction form
    622,921,764.60/934,382,646.90 = 521,640,919.80/x
  3. Step 3: Cross multiply
    622,921,764.60x = 934,382,646.90 × 521,640,919.80
  4. Step 4: Simplify right side
    622,921,764.60x = 487,412,223,374,074,624
  5. Step 5: Solve for x
    x = 487,412,223,374,074,624/622,921,764.60
  6. Step 6: Final answer
    x = 782,461,379.70

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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.