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Finding the Fourth Proportional to 1,365.30, 2,047.95 and 1,078.74

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Solution

The fourth proportional to 1,365.30, 2,047.95 and 1,078.74 is: 1,618.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.30 : 2,047.95 = 1,078.74 : x
  2. Step 2: Convert to fraction form
    1,365.30/2,047.95 = 1,078.74/x
  3. Step 3: Cross multiply
    1,365.30x = 2,047.95 × 1,078.74
  4. Step 4: Simplify right side
    1,365.30x = 2,209,205.58
  5. Step 5: Solve for x
    x = 2,209,205.58/1,365.30
  6. Step 6: Final answer
    x = 1,618.11

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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.