Home / 1,292.05-1,938.21-561.70

Finding the Fourth Proportional to 1,292.05, 1,938.21 and 561.70

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Solution

The fourth proportional to 1,292.05, 1,938.21 and 561.70 is: 842.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.05 : 1,938.21 = 561.70 : x
  2. Step 2: Convert to fraction form
    1,292.05/1,938.21 = 561.70/x
  3. Step 3: Cross multiply
    1,292.05x = 1,938.21 × 561.70
  4. Step 4: Simplify right side
    1,292.05x = 1,088,692.56
  5. Step 5: Solve for x
    x = 1,088,692.56/1,292.05
  6. Step 6: Final answer
    x = 842.61

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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.