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Finding the Fourth Proportional to 2,673.81, 4,009.58 and 918.99

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Solution

The fourth proportional to 2,673.81, 4,009.58 and 918.99 is: 1,378.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,673.81 : 4,009.58 = 918.99 : x
  2. Step 2: Convert to fraction form
    2,673.81/4,009.58 = 918.99/x
  3. Step 3: Cross multiply
    2,673.81x = 4,009.58 × 918.99
  4. Step 4: Simplify right side
    2,673.81x = 3,684,763.92
  5. Step 5: Solve for x
    x = 3,684,763.92/2,673.81
  6. Step 6: Final answer
    x = 1,378.09

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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.