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Finding the Fourth Proportional to 423,512.64, 635,099.40 and 186,687

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Solution

The fourth proportional to 423,512.64, 635,099.40 and 186,687 is: 279,955.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,512.64 : 635,099.40 = 186,687 : x
  2. Step 2: Convert to fraction form
    423,512.64/635,099.40 = 186,687/x
  3. Step 3: Cross multiply
    423,512.64x = 635,099.40 × 186,687
  4. Step 4: Simplify right side
    423,512.64x = 118,564,801,687.80
  5. Step 5: Solve for x
    x = 118,564,801,687.80/423,512.64
  6. Step 6: Final answer
    x = 279,955.76

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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.