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Finding the Fourth Proportional to 529,390.72, 730,558.62 and 287,672.70

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Solution

The fourth proportional to 529,390.72, 730,558.62 and 287,672.70 is: 396,988.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,390.72 : 730,558.62 = 287,672.70 : x
  2. Step 2: Convert to fraction form
    529,390.72/730,558.62 = 287,672.70/x
  3. Step 3: Cross multiply
    529,390.72x = 730,558.62 × 287,672.70
  4. Step 4: Simplify right side
    529,390.72x = 210,161,770,723.67
  5. Step 5: Solve for x
    x = 210,161,770,723.67/529,390.72
  6. Step 6: Final answer
    x = 396,988.01

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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.