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Finding the Fourth Proportional to 528,736.58, 729,657.41 and 287,019.32

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Solution

The fourth proportional to 528,736.58, 729,657.41 and 287,019.32 is: 396,087.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,736.58 : 729,657.41 = 287,019.32 : x
  2. Step 2: Convert to fraction form
    528,736.58/729,657.41 = 287,019.32/x
  3. Step 3: Cross multiply
    528,736.58x = 729,657.41 × 287,019.32
  4. Step 4: Simplify right side
    528,736.58x = 209,425,769,375.02
  5. Step 5: Solve for x
    x = 209,425,769,375.02/528,736.58
  6. Step 6: Final answer
    x = 396,087.16

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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.