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Finding the Fourth Proportional to 1,362.63, 1,879.76 and 890.68

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Solution

The fourth proportional to 1,362.63, 1,879.76 and 890.68 is: 1,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.63 : 1,879.76 = 890.68 : x
  2. Step 2: Convert to fraction form
    1,362.63/1,879.76 = 890.68/x
  3. Step 3: Cross multiply
    1,362.63x = 1,879.76 × 890.68
  4. Step 4: Simplify right side
    1,362.63x = 1,674,255.24
  5. Step 5: Solve for x
    x = 1,674,255.24/1,362.63
  6. Step 6: Final answer
    x = 1,228.70

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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.