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Finding the Fourth Proportional to 1,394.87, 1,925.55 and 897.41

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Solution

The fourth proportional to 1,394.87, 1,925.55 and 897.41 is: 1,238.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.87 : 1,925.55 = 897.41 : x
  2. Step 2: Convert to fraction form
    1,394.87/1,925.55 = 897.41/x
  3. Step 3: Cross multiply
    1,394.87x = 1,925.55 × 897.41
  4. Step 4: Simplify right side
    1,394.87x = 1,728,012.64
  5. Step 5: Solve for x
    x = 1,728,012.64/1,394.87
  6. Step 6: Final answer
    x = 1,238.84

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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.