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Finding the Fourth Proportional to 520,814.79, 781,216.61 and 395,226.52

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Solution

The fourth proportional to 520,814.79, 781,216.61 and 395,226.52 is: 592,835.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,814.79 : 781,216.61 = 395,226.52 : x
  2. Step 2: Convert to fraction form
    520,814.79/781,216.61 = 395,226.52/x
  3. Step 3: Cross multiply
    520,814.79x = 781,216.61 × 395,226.52
  4. Step 4: Simplify right side
    520,814.79x = 308,757,522,136.50
  5. Step 5: Solve for x
    x = 308,757,522,136.50/520,814.79
  6. Step 6: Final answer
    x = 592,835.55

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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.