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Finding the Fourth Proportional to 520,322.40, 780,317.51 and 165,253.37

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Solution

The fourth proportional to 520,322.40, 780,317.51 and 165,253.37 is: 247,827.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,322.40 : 780,317.51 = 165,253.37 : x
  2. Step 2: Convert to fraction form
    520,322.40/780,317.51 = 165,253.37/x
  3. Step 3: Cross multiply
    520,322.40x = 780,317.51 × 165,253.37
  4. Step 4: Simplify right side
    520,322.40x = 128,950,093,469.65
  5. Step 5: Solve for x
    x = 128,950,093,469.65/520,322.40
  6. Step 6: Final answer
    x = 247,827.30

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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.