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Finding the Fourth Proportional to 624,456.90, 861,771.42 and 382,692.78

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Solution

The fourth proportional to 624,456.90, 861,771.42 and 382,692.78 is: 528,128.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,456.90 : 861,771.42 = 382,692.78 : x
  2. Step 2: Convert to fraction form
    624,456.90/861,771.42 = 382,692.78/x
  3. Step 3: Cross multiply
    624,456.90x = 861,771.42 × 382,692.78
  4. Step 4: Simplify right side
    624,456.90x = 329,793,700,444.35
  5. Step 5: Solve for x
    x = 329,793,700,444.35/624,456.90
  6. Step 6: Final answer
    x = 528,128.84

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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.