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Finding the Fourth Proportional to 529,422.90, 730,601.20 and 287,700.90

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Solution

The fourth proportional to 529,422.90, 730,601.20 and 287,700.90 is: 397,025.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,422.90 : 730,601.20 = 287,700.90 : x
  2. Step 2: Convert to fraction form
    529,422.90/730,601.20 = 287,700.90/x
  3. Step 3: Cross multiply
    529,422.90x = 730,601.20 × 287,700.90
  4. Step 4: Simplify right side
    529,422.90x = 210,194,622,781.08
  5. Step 5: Solve for x
    x = 210,194,622,781.08/529,422.90
  6. Step 6: Final answer
    x = 397,025.94

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1.5x scale

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.