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Finding the Fourth Proportional to 889,721.60, 1,337,692.80 and 871,059.20

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Solution

The fourth proportional to 889,721.60, 1,337,692.80 and 871,059.20 is: 1,309,633.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,721.60 : 1,337,692.80 = 871,059.20 : x
  2. Step 2: Convert to fraction form
    889,721.60/1,337,692.80 = 871,059.20/x
  3. Step 3: Cross multiply
    889,721.60x = 1,337,692.80 × 871,059.20
  4. Step 4: Simplify right side
    889,721.60x = 1,165,209,620,213.76
  5. Step 5: Solve for x
    x = 1,165,209,620,213.76/889,721.60
  6. Step 6: Final answer
    x = 1,309,633.96

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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.