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Finding the Fourth Proportional to 2,916.84, 4,018.56 and 2,778.60

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Solution

The fourth proportional to 2,916.84, 4,018.56 and 2,778.60 is: 3,828.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916.84 : 4,018.56 = 2,778.60 : x
  2. Step 2: Convert to fraction form
    2,916.84/4,018.56 = 2,778.60/x
  3. Step 3: Cross multiply
    2,916.84x = 4,018.56 × 2,778.60
  4. Step 4: Simplify right side
    2,916.84x = 11,165,970.82
  5. Step 5: Solve for x
    x = 11,165,970.82/2,916.84
  6. Step 6: Final answer
    x = 3,828.11

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1.5x scale

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.