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Finding the Fourth Proportional to 941.37, 1,406.49 and 909.07

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Solution

The fourth proportional to 941.37, 1,406.49 and 909.07 is: 1,358.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.37 : 1,406.49 = 909.07 : x
  2. Step 2: Convert to fraction form
    941.37/1,406.49 = 909.07/x
  3. Step 3: Cross multiply
    941.37x = 1,406.49 × 909.07
  4. Step 4: Simplify right side
    941.37x = 1,278,601.41
  5. Step 5: Solve for x
    x = 1,278,601.41/941.37
  6. Step 6: Final answer
    x = 1,358.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.