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Finding the Fourth Proportional to 457,287.60, 685,931.40 and 331,316.40

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Solution

The fourth proportional to 457,287.60, 685,931.40 and 331,316.40 is: 496,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,287.60 : 685,931.40 = 331,316.40 : x
  2. Step 2: Convert to fraction form
    457,287.60/685,931.40 = 331,316.40/x
  3. Step 3: Cross multiply
    457,287.60x = 685,931.40 × 331,316.40
  4. Step 4: Simplify right side
    457,287.60x = 227,260,322,094.96
  5. Step 5: Solve for x
    x = 227,260,322,094.96/457,287.60
  6. Step 6: Final answer
    x = 496,974.60

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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.