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Finding the Fourth Proportional to 2,821.95, 3,894.14 and 1,562.94

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Solution

The fourth proportional to 2,821.95, 3,894.14 and 1,562.94 is: 2,156.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.95 : 3,894.14 = 1,562.94 : x
  2. Step 2: Convert to fraction form
    2,821.95/3,894.14 = 1,562.94/x
  3. Step 3: Cross multiply
    2,821.95x = 3,894.14 × 1,562.94
  4. Step 4: Simplify right side
    2,821.95x = 6,086,307.17
  5. Step 5: Solve for x
    x = 6,086,307.17/2,821.95
  6. Step 6: Final answer
    x = 2,156.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.