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Finding the Fourth Proportional to 331,531.21, 497,300.28 and 265,391.77

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Solution

The fourth proportional to 331,531.21, 497,300.28 and 265,391.77 is: 398,090.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,531.21 : 497,300.28 = 265,391.77 : x
  2. Step 2: Convert to fraction form
    331,531.21/497,300.28 = 265,391.77/x
  3. Step 3: Cross multiply
    331,531.21x = 497,300.28 × 265,391.77
  4. Step 4: Simplify right side
    331,531.21x = 131,979,399,044.19
  5. Step 5: Solve for x
    x = 131,979,399,044.19/331,531.21
  6. Step 6: Final answer
    x = 398,090.43

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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.