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Finding the Fourth Proportional to 426,602.60, 640,020.56 and 186,672.88

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Solution

The fourth proportional to 426,602.60, 640,020.56 and 186,672.88 is: 280,060.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,602.60 : 640,020.56 = 186,672.88 : x
  2. Step 2: Convert to fraction form
    426,602.60/640,020.56 = 186,672.88/x
  3. Step 3: Cross multiply
    426,602.60x = 640,020.56 × 186,672.88
  4. Step 4: Simplify right side
    426,602.60x = 119,474,481,194.41
  5. Step 5: Solve for x
    x = 119,474,481,194.41/426,602.60
  6. Step 6: Final answer
    x = 280,060.37

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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.