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Finding the Fourth Proportional to 528,873.92, 729,847.20 and 287,156.48

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Solution

The fourth proportional to 528,873.92, 729,847.20 and 287,156.48 is: 396,276.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,873.92 : 729,847.20 = 287,156.48 : x
  2. Step 2: Convert to fraction form
    528,873.92/729,847.20 = 287,156.48/x
  3. Step 3: Cross multiply
    528,873.92x = 729,847.20 × 287,156.48
  4. Step 4: Simplify right side
    528,873.92x = 209,580,352,889.86
  5. Step 5: Solve for x
    x = 209,580,352,889.86/528,873.92
  6. Step 6: Final answer
    x = 396,276.59

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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.