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Finding the Fourth Proportional to 1,590.83, 2,195.49 and 961.67

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Solution

The fourth proportional to 1,590.83, 2,195.49 and 961.67 is: 1,327.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.83 : 2,195.49 = 961.67 : x
  2. Step 2: Convert to fraction form
    1,590.83/2,195.49 = 961.67/x
  3. Step 3: Cross multiply
    1,590.83x = 2,195.49 × 961.67
  4. Step 4: Simplify right side
    1,590.83x = 2,111,336.87
  5. Step 5: Solve for x
    x = 2,111,336.87/1,590.83
  6. Step 6: Final answer
    x = 1,327.19

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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.