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Finding the Fourth Proportional to 520,373.36, 780,684.28 and 165,388.03

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Solution

The fourth proportional to 520,373.36, 780,684.28 and 165,388.03 is: 248,121.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,373.36 : 780,684.28 = 165,388.03 : x
  2. Step 2: Convert to fraction form
    520,373.36/780,684.28 = 165,388.03/x
  3. Step 3: Cross multiply
    520,373.36x = 780,684.28 × 165,388.03
  4. Step 4: Simplify right side
    520,373.36x = 129,115,832,755.99
  5. Step 5: Solve for x
    x = 129,115,832,755.99/520,373.36
  6. Step 6: Final answer
    x = 248,121.53

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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.