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Finding the Fourth Proportional to 529,481.20, 730,689.71 and 287,763.79

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Solution

The fourth proportional to 529,481.20, 730,689.71 and 287,763.79 is: 397,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,481.20 : 730,689.71 = 287,763.79 : x
  2. Step 2: Convert to fraction form
    529,481.20/730,689.71 = 287,763.79/x
  3. Step 3: Cross multiply
    529,481.20x = 730,689.71 × 287,763.79
  4. Step 4: Simplify right side
    529,481.20x = 210,266,040,263.60
  5. Step 5: Solve for x
    x = 210,266,040,263.60/529,481.20
  6. Step 6: Final answer
    x = 397,117.10

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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.