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Finding the Fourth Proportional to 520,098.20, 780,147.30 and 360,665.90

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Solution

The fourth proportional to 520,098.20, 780,147.30 and 360,665.90 is: 540,998.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,098.20 : 780,147.30 = 360,665.90 : x
  2. Step 2: Convert to fraction form
    520,098.20/780,147.30 = 360,665.90/x
  3. Step 3: Cross multiply
    520,098.20x = 780,147.30 × 360,665.90
  4. Step 4: Simplify right side
    520,098.20x = 281,372,528,087.07
  5. Step 5: Solve for x
    x = 281,372,528,087.07/520,098.20
  6. Step 6: Final answer
    x = 540,998.85

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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.