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Finding the Fourth Proportional to 331,342.40, 497,013.60 and 213,147.20

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Solution

The fourth proportional to 331,342.40, 497,013.60 and 213,147.20 is: 319,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,342.40 : 497,013.60 = 213,147.20 : x
  2. Step 2: Convert to fraction form
    331,342.40/497,013.60 = 213,147.20/x
  3. Step 3: Cross multiply
    331,342.40x = 497,013.60 × 213,147.20
  4. Step 4: Simplify right side
    331,342.40x = 105,937,057,201.92
  5. Step 5: Solve for x
    x = 105,937,057,201.92/331,342.40
  6. Step 6: Final answer
    x = 319,720.80

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1.5x scale

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.