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Finding the Fourth Proportional to 1,738.30, 2,605.14 and 641.65

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Solution

The fourth proportional to 1,738.30, 2,605.14 and 641.65 is: 961.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,738.30 : 2,605.14 = 641.65 : x
  2. Step 2: Convert to fraction form
    1,738.30/2,605.14 = 641.65/x
  3. Step 3: Cross multiply
    1,738.30x = 2,605.14 × 641.65
  4. Step 4: Simplify right side
    1,738.30x = 1,671,588.08
  5. Step 5: Solve for x
    x = 1,671,588.08/1,738.30
  6. Step 6: Final answer
    x = 961.62

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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.