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Finding the Fourth Proportional to 1,245.46, 1,868.18 and 379.76

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Solution

The fourth proportional to 1,245.46, 1,868.18 and 379.76 is: 569.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.46 : 1,868.18 = 379.76 : x
  2. Step 2: Convert to fraction form
    1,245.46/1,868.18 = 379.76/x
  3. Step 3: Cross multiply
    1,245.46x = 1,868.18 × 379.76
  4. Step 4: Simplify right side
    1,245.46x = 709,460.99
  5. Step 5: Solve for x
    x = 709,460.99/1,245.46
  6. Step 6: Final answer
    x = 569.64

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.