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Finding the Fourth Proportional to 520,217.52, 780,326.28 and 146,240.52

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Solution

The fourth proportional to 520,217.52, 780,326.28 and 146,240.52 is: 219,360.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,217.52 : 780,326.28 = 146,240.52 : x
  2. Step 2: Convert to fraction form
    520,217.52/780,326.28 = 146,240.52/x
  3. Step 3: Cross multiply
    520,217.52x = 780,326.28 × 146,240.52
  4. Step 4: Simplify right side
    520,217.52x = 114,115,320,956.87
  5. Step 5: Solve for x
    x = 114,115,320,956.87/520,217.52
  6. Step 6: Final answer
    x = 219,360.78

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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.