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Finding the Fourth Proportional to 648.30, 894.75 and 471.87

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Solution

The fourth proportional to 648.30, 894.75 and 471.87 is: 651.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.30 : 894.75 = 471.87 : x
  2. Step 2: Convert to fraction form
    648.30/894.75 = 471.87/x
  3. Step 3: Cross multiply
    648.30x = 894.75 × 471.87
  4. Step 4: Simplify right side
    648.30x = 422,205.68
  5. Step 5: Solve for x
    x = 422,205.68/648.30
  6. Step 6: Final answer
    x = 651.25

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.