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Finding the Fourth Proportional to 1,954.05, 2,931.41 and 859.18

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Solution

The fourth proportional to 1,954.05, 2,931.41 and 859.18 is: 1,288.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.05 : 2,931.41 = 859.18 : x
  2. Step 2: Convert to fraction form
    1,954.05/2,931.41 = 859.18/x
  3. Step 3: Cross multiply
    1,954.05x = 2,931.41 × 859.18
  4. Step 4: Simplify right side
    1,954.05x = 2,518,603.66
  5. Step 5: Solve for x
    x = 2,518,603.66/1,954.05
  6. Step 6: Final answer
    x = 1,288.91

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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.