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Finding the Fourth Proportional to 448.41, 618.23 and 290.76

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Solution

The fourth proportional to 448.41, 618.23 and 290.76 is: 400.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.41 : 618.23 = 290.76 : x
  2. Step 2: Convert to fraction form
    448.41/618.23 = 290.76/x
  3. Step 3: Cross multiply
    448.41x = 618.23 × 290.76
  4. Step 4: Simplify right side
    448.41x = 179,755.10
  5. Step 5: Solve for x
    x = 179,755.10/448.41
  6. Step 6: Final answer
    x = 400.88

Related Problems

Find fourth proportional to 224.20, 309.11 and 145.38
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.