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Finding the Fourth Proportional to 520,132.62, 780,305.86 and 235,686.54

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Solution

The fourth proportional to 520,132.62, 780,305.86 and 235,686.54 is: 353,578.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,132.62 : 780,305.86 = 235,686.54 : x
  2. Step 2: Convert to fraction form
    520,132.62/780,305.86 = 235,686.54/x
  3. Step 3: Cross multiply
    520,132.62x = 780,305.86 × 235,686.54
  4. Step 4: Simplify right side
    520,132.62x = 183,907,588,285.12
  5. Step 5: Solve for x
    x = 183,907,588,285.12/520,132.62
  6. Step 6: Final answer
    x = 353,578.26

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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.