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Finding the Fourth Proportional to 888.23, 1,225.77 and 495.21

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Solution

The fourth proportional to 888.23, 1,225.77 and 495.21 is: 683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.23 : 1,225.77 = 495.21 : x
  2. Step 2: Convert to fraction form
    888.23/1,225.77 = 495.21/x
  3. Step 3: Cross multiply
    888.23x = 1,225.77 × 495.21
  4. Step 4: Simplify right side
    888.23x = 607,014.49
  5. Step 5: Solve for x
    x = 607,014.49/888.23
  6. Step 6: Final answer
    x = 683.40

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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.