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Finding the Fourth Proportional to 1,390.26, 2,085.38 and 364.26

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Solution

The fourth proportional to 1,390.26, 2,085.38 and 364.26 is: 546.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.26 : 2,085.38 = 364.26 : x
  2. Step 2: Convert to fraction form
    1,390.26/2,085.38 = 364.26/x
  3. Step 3: Cross multiply
    1,390.26x = 2,085.38 × 364.26
  4. Step 4: Simplify right side
    1,390.26x = 759,620.52
  5. Step 5: Solve for x
    x = 759,620.52/1,390.26
  6. Step 6: Final answer
    x = 546.39

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1.5x scale

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.