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Finding the Fourth Proportional to 529,690.76, 730,987.35 and 287,989.64

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Solution

The fourth proportional to 529,690.76, 730,987.35 and 287,989.64 is: 397,433.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,690.76 : 730,987.35 = 287,989.64 : x
  2. Step 2: Convert to fraction form
    529,690.76/730,987.35 = 287,989.64/x
  3. Step 3: Cross multiply
    529,690.76x = 730,987.35 × 287,989.64
  4. Step 4: Simplify right side
    529,690.76x = 210,516,783,771.05
  5. Step 5: Solve for x
    x = 210,516,783,771.05/529,690.76
  6. Step 6: Final answer
    x = 397,433.37

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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.