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Finding the Fourth Proportional to 287,563.37, 431,345.25 and 129,607.29

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Solution

The fourth proportional to 287,563.37, 431,345.25 and 129,607.29 is: 194,411.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,563.37 : 431,345.25 = 129,607.29 : x
  2. Step 2: Convert to fraction form
    287,563.37/431,345.25 = 129,607.29/x
  3. Step 3: Cross multiply
    287,563.37x = 431,345.25 × 129,607.29
  4. Step 4: Simplify right side
    287,563.37x = 55,905,488,906.87
  5. Step 5: Solve for x
    x = 55,905,488,906.87/287,563.37
  6. Step 6: Final answer
    x = 194,411.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.