Home / 521,640,266.70-782,460,400.05-391,543,509.90

Finding the Fourth Proportional to 521,640,266.70, 782,460,400.05 and 391,543,509.90

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Solution

The fourth proportional to 521,640,266.70, 782,460,400.05 and 391,543,509.90 is: 587,315,264.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,640,266.70 : 782,460,400.05 = 391,543,509.90 : x
  2. Step 2: Convert to fraction form
    521,640,266.70/782,460,400.05 = 391,543,509.90/x
  3. Step 3: Cross multiply
    521,640,266.70x = 782,460,400.05 × 391,543,509.90
  4. Step 4: Simplify right side
    521,640,266.70x = 306,367,291,393,335,104
  5. Step 5: Solve for x
    x = 306,367,291,393,335,104/521,640,266.70
  6. Step 6: Final answer
    x = 587,315,264.85

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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.