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Finding the Fourth Proportional to 520,093.20, 780,139.80 and 360,660.90

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Solution

The fourth proportional to 520,093.20, 780,139.80 and 360,660.90 is: 540,991.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,093.20 : 780,139.80 = 360,660.90 : x
  2. Step 2: Convert to fraction form
    520,093.20/780,139.80 = 360,660.90/x
  3. Step 3: Cross multiply
    520,093.20x = 780,139.80 × 360,660.90
  4. Step 4: Simplify right side
    520,093.20x = 281,365,922,393.82
  5. Step 5: Solve for x
    x = 281,365,922,393.82/520,093.20
  6. Step 6: Final answer
    x = 540,991.35

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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.