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Finding the Fourth Proportional to 331,287.60, 496,931.40 and 219,313.20

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Solution

The fourth proportional to 331,287.60, 496,931.40 and 219,313.20 is: 328,969.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,287.60 : 496,931.40 = 219,313.20 : x
  2. Step 2: Convert to fraction form
    331,287.60/496,931.40 = 219,313.20/x
  3. Step 3: Cross multiply
    331,287.60x = 496,931.40 × 219,313.20
  4. Step 4: Simplify right side
    331,287.60x = 108,983,615,514.48
  5. Step 5: Solve for x
    x = 108,983,615,514.48/331,287.60
  6. Step 6: Final answer
    x = 328,969.80

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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.