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Finding the Fourth Proportional to 2,878.60, 4,307.10 and 1,906.60

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Solution

The fourth proportional to 2,878.60, 4,307.10 and 1,906.60 is: 2,852.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.60 : 4,307.10 = 1,906.60 : x
  2. Step 2: Convert to fraction form
    2,878.60/4,307.10 = 1,906.60/x
  3. Step 3: Cross multiply
    2,878.60x = 4,307.10 × 1,906.60
  4. Step 4: Simplify right side
    2,878.60x = 8,211,916.86
  5. Step 5: Solve for x
    x = 8,211,916.86/2,878.60
  6. Step 6: Final answer
    x = 2,852.75

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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.