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Finding the Fourth Proportional to 1,371.01, 2,054.58 and 784.81

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Solution

The fourth proportional to 1,371.01, 2,054.58 and 784.81 is: 1,176.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.01 : 2,054.58 = 784.81 : x
  2. Step 2: Convert to fraction form
    1,371.01/2,054.58 = 784.81/x
  3. Step 3: Cross multiply
    1,371.01x = 2,054.58 × 784.81
  4. Step 4: Simplify right side
    1,371.01x = 1,612,454.93
  5. Step 5: Solve for x
    x = 1,612,454.93/1,371.01
  6. Step 6: Final answer
    x = 1,176.11

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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.