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Finding the Fourth Proportional to 426,562.09, 639,962.72 and 186,696.90

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Solution

The fourth proportional to 426,562.09, 639,962.72 and 186,696.90 is: 280,097.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,562.09 : 639,962.72 = 186,696.90 : x
  2. Step 2: Convert to fraction form
    426,562.09/639,962.72 = 186,696.90/x
  3. Step 3: Cross multiply
    426,562.09x = 639,962.72 × 186,696.90
  4. Step 4: Simplify right side
    426,562.09x = 119,479,053,406.18
  5. Step 5: Solve for x
    x = 119,479,053,406.18/426,562.09
  6. Step 6: Final answer
    x = 280,097.68

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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.