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Finding the Fourth Proportional to 648.38, 894.55 and 427.45

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Solution

The fourth proportional to 648.38, 894.55 and 427.45 is: 589.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.38 : 894.55 = 427.45 : x
  2. Step 2: Convert to fraction form
    648.38/894.55 = 427.45/x
  3. Step 3: Cross multiply
    648.38x = 894.55 × 427.45
  4. Step 4: Simplify right side
    648.38x = 382,375.40
  5. Step 5: Solve for x
    x = 382,375.40/648.38
  6. Step 6: Final answer
    x = 589.74

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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.