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Finding the Fourth Proportional to 261,664.80, 393,080.40 and 251,037.60

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Solution

The fourth proportional to 261,664.80, 393,080.40 and 251,037.60 is: 377,115.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,664.80 : 393,080.40 = 251,037.60 : x
  2. Step 2: Convert to fraction form
    261,664.80/393,080.40 = 251,037.60/x
  3. Step 3: Cross multiply
    261,664.80x = 393,080.40 × 251,037.60
  4. Step 4: Simplify right side
    261,664.80x = 98,677,960,223.04
  5. Step 5: Solve for x
    x = 98,677,960,223.04/261,664.80
  6. Step 6: Final answer
    x = 377,115.91

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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.