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Finding the Fourth Proportional to 528,889.33, 729,870.15 and 287,171.92

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Solution

The fourth proportional to 528,889.33, 729,870.15 and 287,171.92 is: 396,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,889.33 : 729,870.15 = 287,171.92 : x
  2. Step 2: Convert to fraction form
    528,889.33/729,870.15 = 287,171.92/x
  3. Step 3: Cross multiply
    528,889.33x = 729,870.15 × 287,171.92
  4. Step 4: Simplify right side
    528,889.33x = 209,598,212,326.19
  5. Step 5: Solve for x
    x = 209,598,212,326.19/528,889.33
  6. Step 6: Final answer
    x = 396,298.81

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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.