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Finding the Fourth Proportional to 1,396.06, 1,925 and 954.20

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Solution

The fourth proportional to 1,396.06, 1,925 and 954.20 is: 1,315.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.06 : 1,925 = 954.20 : x
  2. Step 2: Convert to fraction form
    1,396.06/1,925 = 954.20/x
  3. Step 3: Cross multiply
    1,396.06x = 1,925 × 954.20
  4. Step 4: Simplify right side
    1,396.06x = 1,836,835
  5. Step 5: Solve for x
    x = 1,836,835/1,396.06
  6. Step 6: Final answer
    x = 1,315.73

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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.