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Finding the Fourth Proportional to 1,354.58, 1,865.39 and 1,205.54

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Solution

The fourth proportional to 1,354.58, 1,865.39 and 1,205.54 is: 1,660.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.58 : 1,865.39 = 1,205.54 : x
  2. Step 2: Convert to fraction form
    1,354.58/1,865.39 = 1,205.54/x
  3. Step 3: Cross multiply
    1,354.58x = 1,865.39 × 1,205.54
  4. Step 4: Simplify right side
    1,354.58x = 2,248,802.26
  5. Step 5: Solve for x
    x = 2,248,802.26/1,354.58
  6. Step 6: Final answer
    x = 1,660.15

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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.