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Finding the Fourth Proportional to 519,039.80, 778,559.70 and 322,431.80

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Solution

The fourth proportional to 519,039.80, 778,559.70 and 322,431.80 is: 483,647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,039.80 : 778,559.70 = 322,431.80 : x
  2. Step 2: Convert to fraction form
    519,039.80/778,559.70 = 322,431.80/x
  3. Step 3: Cross multiply
    519,039.80x = 778,559.70 × 322,431.80
  4. Step 4: Simplify right side
    519,039.80x = 251,032,405,478.46
  5. Step 5: Solve for x
    x = 251,032,405,478.46/519,039.80
  6. Step 6: Final answer
    x = 483,647.70

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Similar ratio
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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.