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Finding the Fourth Proportional to 689,600.80, 1,034,692.80 and 437,075.20

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Solution

The fourth proportional to 689,600.80, 1,034,692.80 and 437,075.20 is: 655,797.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,600.80 : 1,034,692.80 = 437,075.20 : x
  2. Step 2: Convert to fraction form
    689,600.80/1,034,692.80 = 437,075.20/x
  3. Step 3: Cross multiply
    689,600.80x = 1,034,692.80 × 437,075.20
  4. Step 4: Simplify right side
    689,600.80x = 452,238,562,498.56
  5. Step 5: Solve for x
    x = 452,238,562,498.56/689,600.80
  6. Step 6: Final answer
    x = 655,797.62

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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.