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Finding the Fourth Proportional to 640,255.76, 960,487.84 and 299,040.39

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Solution

The fourth proportional to 640,255.76, 960,487.84 and 299,040.39 is: 448,609.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,255.76 : 960,487.84 = 299,040.39 : x
  2. Step 2: Convert to fraction form
    640,255.76/960,487.84 = 299,040.39/x
  3. Step 3: Cross multiply
    640,255.76x = 960,487.84 × 299,040.39
  4. Step 4: Simplify right side
    640,255.76x = 287,224,658,637.66
  5. Step 5: Solve for x
    x = 287,224,658,637.66/640,255.76
  6. Step 6: Final answer
    x = 448,609.25

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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.