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Finding the Fourth Proportional to 520,086.60, 780,129.90 and 254,017.80

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Solution

The fourth proportional to 520,086.60, 780,129.90 and 254,017.80 is: 381,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,086.60 : 780,129.90 = 254,017.80 : x
  2. Step 2: Convert to fraction form
    520,086.60/780,129.90 = 254,017.80/x
  3. Step 3: Cross multiply
    520,086.60x = 780,129.90 × 254,017.80
  4. Step 4: Simplify right side
    520,086.60x = 198,166,880,912.22
  5. Step 5: Solve for x
    x = 198,166,880,912.22/520,086.60
  6. Step 6: Final answer
    x = 381,026.70

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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.