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Finding the Fourth Proportional to 287,649.62, 431,668.84 and 100,662.74

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Solution

The fourth proportional to 287,649.62, 431,668.84 and 100,662.74 is: 151,062.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,649.62 : 431,668.84 = 100,662.74 : x
  2. Step 2: Convert to fraction form
    287,649.62/431,668.84 = 100,662.74/x
  3. Step 3: Cross multiply
    287,649.62x = 431,668.84 × 100,662.74
  4. Step 4: Simplify right side
    287,649.62x = 43,452,968,207.02
  5. Step 5: Solve for x
    x = 43,452,968,207.02/287,649.62
  6. Step 6: Final answer
    x = 151,062.14

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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.