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Finding the Fourth Proportional to 520,820.52, 780,972.35 and 165,788.39

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Solution

The fourth proportional to 520,820.52, 780,972.35 and 165,788.39 is: 248,600.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,820.52 : 780,972.35 = 165,788.39 : x
  2. Step 2: Convert to fraction form
    520,820.52/780,972.35 = 165,788.39/x
  3. Step 3: Cross multiply
    520,820.52x = 780,972.35 × 165,788.39
  4. Step 4: Simplify right side
    520,820.52x = 129,476,143,807.21
  5. Step 5: Solve for x
    x = 129,476,143,807.21/520,820.52
  6. Step 6: Final answer
    x = 248,600.31

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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.