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Finding the Fourth Proportional to 909.26, 1,254.78 and 495.26

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Solution

The fourth proportional to 909.26, 1,254.78 and 495.26 is: 683.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.26 : 1,254.78 = 495.26 : x
  2. Step 2: Convert to fraction form
    909.26/1,254.78 = 495.26/x
  3. Step 3: Cross multiply
    909.26x = 1,254.78 × 495.26
  4. Step 4: Simplify right side
    909.26x = 621,442.34
  5. Step 5: Solve for x
    x = 621,442.34/909.26
  6. Step 6: Final answer
    x = 683.46

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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.