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Finding the Fourth Proportional to 519,466.80, 779,200.20 and 331,460.40

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Solution

The fourth proportional to 519,466.80, 779,200.20 and 331,460.40 is: 497,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,466.80 : 779,200.20 = 331,460.40 : x
  2. Step 2: Convert to fraction form
    519,466.80/779,200.20 = 331,460.40/x
  3. Step 3: Cross multiply
    519,466.80x = 779,200.20 × 331,460.40
  4. Step 4: Simplify right side
    519,466.80x = 258,274,009,972.08
  5. Step 5: Solve for x
    x = 258,274,009,972.08/519,466.80
  6. Step 6: Final answer
    x = 497,190.60

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Double scale
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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.