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Finding the Fourth Proportional to 528,538.91, 729,375.80 and 310,772.16

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Solution

The fourth proportional to 528,538.91, 729,375.80 and 310,772.16 is: 428,860.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,538.91 : 729,375.80 = 310,772.16 : x
  2. Step 2: Convert to fraction form
    528,538.91/729,375.80 = 310,772.16/x
  3. Step 3: Cross multiply
    528,538.91x = 729,375.80 × 310,772.16
  4. Step 4: Simplify right side
    528,538.91x = 226,669,691,263.87
  5. Step 5: Solve for x
    x = 226,669,691,263.87/528,538.91
  6. Step 6: Final answer
    x = 428,860.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.