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Finding the Fourth Proportional to 520,318.23, 780,465.15 and 239,835.48

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Solution

The fourth proportional to 520,318.23, 780,465.15 and 239,835.48 is: 359,747.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,318.23 : 780,465.15 = 239,835.48 : x
  2. Step 2: Convert to fraction form
    520,318.23/780,465.15 = 239,835.48/x
  3. Step 3: Cross multiply
    520,318.23x = 780,465.15 × 239,835.48
  4. Step 4: Simplify right side
    520,318.23x = 187,183,233,873.52
  5. Step 5: Solve for x
    x = 187,183,233,873.52/520,318.23
  6. Step 6: Final answer
    x = 359,747.60

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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.