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Finding the Fourth Proportional to 261,796.80, 393,278.40 and 251,169.60

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Solution

The fourth proportional to 261,796.80, 393,278.40 and 251,169.60 is: 377,313.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,796.80 : 393,278.40 = 251,169.60 : x
  2. Step 2: Convert to fraction form
    261,796.80/393,278.40 = 251,169.60/x
  3. Step 3: Cross multiply
    261,796.80x = 393,278.40 × 251,169.60
  4. Step 4: Simplify right side
    261,796.80x = 98,779,578,416.64
  5. Step 5: Solve for x
    x = 98,779,578,416.64/261,796.80
  6. Step 6: Final answer
    x = 377,313.93

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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.