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Finding the Fourth Proportional to 520,300.60, 780,439.96 and 239,817.85

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Solution

The fourth proportional to 520,300.60, 780,439.96 and 239,817.85 is: 359,721.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,300.60 : 780,439.96 = 239,817.85 : x
  2. Step 2: Convert to fraction form
    520,300.60/780,439.96 = 239,817.85/x
  3. Step 3: Cross multiply
    520,300.60x = 780,439.96 × 239,817.85
  4. Step 4: Simplify right side
    520,300.60x = 187,163,431,609.96
  5. Step 5: Solve for x
    x = 187,163,431,609.96/520,300.60
  6. Step 6: Final answer
    x = 359,721.73

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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.