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Finding the Fourth Proportional to 520,138.29, 780,432.83 and 183,419.54

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Solution

The fourth proportional to 520,138.29, 780,432.83 and 183,419.54 is: 275,208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,138.29 : 780,432.83 = 183,419.54 : x
  2. Step 2: Convert to fraction form
    520,138.29/780,432.83 = 183,419.54/x
  3. Step 3: Cross multiply
    520,138.29x = 780,432.83 × 183,419.54
  4. Step 4: Simplify right side
    520,138.29x = 143,146,625,860.24
  5. Step 5: Solve for x
    x = 143,146,625,860.24/520,138.29
  6. Step 6: Final answer
    x = 275,208.78

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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.