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Finding the Fourth Proportional to 639,692.40, 957,455.52 and 471,146.40

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Solution

The fourth proportional to 639,692.40, 957,455.52 and 471,146.40 is: 705,185.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,692.40 : 957,455.52 = 471,146.40 : x
  2. Step 2: Convert to fraction form
    639,692.40/957,455.52 = 471,146.40/x
  3. Step 3: Cross multiply
    639,692.40x = 957,455.52 × 471,146.40
  4. Step 4: Simplify right side
    639,692.40x = 451,101,721,408.13
  5. Step 5: Solve for x
    x = 451,101,721,408.13/639,692.40
  6. Step 6: Final answer
    x = 705,185.37

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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.