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Finding the Fourth Proportional to 1,637.81, 2,260.16 and 891.80

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Solution

The fourth proportional to 1,637.81, 2,260.16 and 891.80 is: 1,230.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.81 : 2,260.16 = 891.80 : x
  2. Step 2: Convert to fraction form
    1,637.81/2,260.16 = 891.80/x
  3. Step 3: Cross multiply
    1,637.81x = 2,260.16 × 891.80
  4. Step 4: Simplify right side
    1,637.81x = 2,015,610.69
  5. Step 5: Solve for x
    x = 2,015,610.69/1,637.81
  6. Step 6: Final answer
    x = 1,230.67

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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.