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Finding the Fourth Proportional to 515,947.20, 773,920.80 and 486,916.80

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Solution

The fourth proportional to 515,947.20, 773,920.80 and 486,916.80 is: 730,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,947.20 : 773,920.80 = 486,916.80 : x
  2. Step 2: Convert to fraction form
    515,947.20/773,920.80 = 486,916.80/x
  3. Step 3: Cross multiply
    515,947.20x = 773,920.80 × 486,916.80
  4. Step 4: Simplify right side
    515,947.20x = 376,835,039,389.44
  5. Step 5: Solve for x
    x = 376,835,039,389.44/515,947.20
  6. Step 6: Final answer
    x = 730,375.20

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1.5x scale

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.