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Finding the Fourth Proportional to 520,265.43, 780,398.46 and 146,288.43

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Solution

The fourth proportional to 520,265.43, 780,398.46 and 146,288.43 is: 219,432.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,265.43 : 780,398.46 = 146,288.43 : x
  2. Step 2: Convert to fraction form
    520,265.43/780,398.46 = 146,288.43/x
  3. Step 3: Cross multiply
    520,265.43x = 780,398.46 × 146,288.43
  4. Step 4: Simplify right side
    520,265.43x = 114,163,265,487.82
  5. Step 5: Solve for x
    x = 114,163,265,487.82/520,265.43
  6. Step 6: Final answer
    x = 219,432.73

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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.