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Finding the Fourth Proportional to 1,692.79, 2,539.19 and 522.79

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Solution

The fourth proportional to 1,692.79, 2,539.19 and 522.79 is: 784.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.79 : 2,539.19 = 522.79 : x
  2. Step 2: Convert to fraction form
    1,692.79/2,539.19 = 522.79/x
  3. Step 3: Cross multiply
    1,692.79x = 2,539.19 × 522.79
  4. Step 4: Simplify right side
    1,692.79x = 1,327,447.83
  5. Step 5: Solve for x
    x = 1,327,447.83/1,692.79
  6. Step 6: Final answer
    x = 784.18

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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.