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Finding the Fourth Proportional to 959,692.80, 1,325,260.80 and 642,662.40

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Solution

The fourth proportional to 959,692.80, 1,325,260.80 and 642,662.40 is: 887,466.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    959,692.80 : 1,325,260.80 = 642,662.40 : x
  2. Step 2: Convert to fraction form
    959,692.80/1,325,260.80 = 642,662.40/x
  3. Step 3: Cross multiply
    959,692.80x = 1,325,260.80 × 642,662.40
  4. Step 4: Simplify right side
    959,692.80x = 851,695,286,353.92
  5. Step 5: Solve for x
    x = 851,695,286,353.92/959,692.80
  6. Step 6: Final answer
    x = 887,466.58

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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.