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Finding the Fourth Proportional to 640,431.27, 960,804.54 and 451,261.08

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Solution

The fourth proportional to 640,431.27, 960,804.54 and 451,261.08 is: 677,002.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,431.27 : 960,804.54 = 451,261.08 : x
  2. Step 2: Convert to fraction form
    640,431.27/960,804.54 = 451,261.08/x
  3. Step 3: Cross multiply
    640,431.27x = 960,804.54 × 451,261.08
  4. Step 4: Simplify right side
    640,431.27x = 433,573,694,389.30
  5. Step 5: Solve for x
    x = 433,573,694,389.30/640,431.27
  6. Step 6: Final answer
    x = 677,002.69

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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.