Home / 438,731.20-656,784.60-261,146.80

Finding the Fourth Proportional to 438,731.20, 656,784.60 and 261,146.80

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Solution

The fourth proportional to 438,731.20, 656,784.60 and 261,146.80 is: 390,939.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,731.20 : 656,784.60 = 261,146.80 : x
  2. Step 2: Convert to fraction form
    438,731.20/656,784.60 = 261,146.80/x
  3. Step 3: Cross multiply
    438,731.20x = 656,784.60 × 261,146.80
  4. Step 4: Simplify right side
    438,731.20x = 171,517,196,579.28
  5. Step 5: Solve for x
    x = 171,517,196,579.28/438,731.20
  6. Step 6: Final answer
    x = 390,939.14

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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.