Home / 1,390.25-2,082.54-1,041.95

Finding the Fourth Proportional to 1,390.25, 2,082.54 and 1,041.95

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Solution

The fourth proportional to 1,390.25, 2,082.54 and 1,041.95 is: 1,560.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.25 : 2,082.54 = 1,041.95 : x
  2. Step 2: Convert to fraction form
    1,390.25/2,082.54 = 1,041.95/x
  3. Step 3: Cross multiply
    1,390.25x = 2,082.54 × 1,041.95
  4. Step 4: Simplify right side
    1,390.25x = 2,169,902.55
  5. Step 5: Solve for x
    x = 2,169,902.55/1,390.25
  6. Step 6: Final answer
    x = 1,560.80

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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.