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Finding the Fourth Proportional to 639,692.50, 882,853.41 and 371,420.50

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Solution

The fourth proportional to 639,692.50, 882,853.41 and 371,420.50 is: 512,605.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,692.50 : 882,853.41 = 371,420.50 : x
  2. Step 2: Convert to fraction form
    639,692.50/882,853.41 = 371,420.50/x
  3. Step 3: Cross multiply
    639,692.50x = 882,853.41 × 371,420.50
  4. Step 4: Simplify right side
    639,692.50x = 327,909,854,968.91
  5. Step 5: Solve for x
    x = 327,909,854,968.91/639,692.50
  6. Step 6: Final answer
    x = 512,605.44

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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.