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Finding the Fourth Proportional to 1,673.96, 2,309.98 and 917.73

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Solution

The fourth proportional to 1,673.96, 2,309.98 and 917.73 is: 1,266.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,673.96 : 2,309.98 = 917.73 : x
  2. Step 2: Convert to fraction form
    1,673.96/2,309.98 = 917.73/x
  3. Step 3: Cross multiply
    1,673.96x = 2,309.98 × 917.73
  4. Step 4: Simplify right side
    1,673.96x = 2,119,937.95
  5. Step 5: Solve for x
    x = 2,119,937.95/1,673.96
  6. Step 6: Final answer
    x = 1,266.42

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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.