Home / 528,889.20-729,867.96-287,172.24

Finding the Fourth Proportional to 528,889.20, 729,867.96 and 287,172.24

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Solution

The fourth proportional to 528,889.20, 729,867.96 and 287,172.24 is: 396,298.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,889.20 : 729,867.96 = 287,172.24 : x
  2. Step 2: Convert to fraction form
    528,889.20/729,867.96 = 287,172.24/x
  3. Step 3: Cross multiply
    528,889.20x = 729,867.96 × 287,172.24
  4. Step 4: Simplify right side
    528,889.20x = 209,597,816,977.43
  5. Step 5: Solve for x
    x = 209,597,816,977.43/528,889.20
  6. Step 6: Final answer
    x = 396,298.16

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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.