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Finding the Fourth Proportional to 909.41, 1,255.48 and 626.23

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Solution

The fourth proportional to 909.41, 1,255.48 and 626.23 is: 864.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.41 : 1,255.48 = 626.23 : x
  2. Step 2: Convert to fraction form
    909.41/1,255.48 = 626.23/x
  3. Step 3: Cross multiply
    909.41x = 1,255.48 × 626.23
  4. Step 4: Simplify right side
    909.41x = 786,219.24
  5. Step 5: Solve for x
    x = 786,219.24/909.41
  6. Step 6: Final answer
    x = 864.54

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Double scale
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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.