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Finding the Fourth Proportional to 624,460.90, 861,776.94 and 382,696.78

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Solution

The fourth proportional to 624,460.90, 861,776.94 and 382,696.78 is: 528,134.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,460.90 : 861,776.94 = 382,696.78 : x
  2. Step 2: Convert to fraction form
    624,460.90/861,776.94 = 382,696.78/x
  3. Step 3: Cross multiply
    624,460.90x = 861,776.94 × 382,696.78
  4. Step 4: Simplify right side
    624,460.90x = 329,799,260,016.25
  5. Step 5: Solve for x
    x = 329,799,260,016.25/624,460.90
  6. Step 6: Final answer
    x = 528,134.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.