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Finding the Fourth Proportional to 448.53, 669.50 and 417.20

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Solution

The fourth proportional to 448.53, 669.50 and 417.20 is: 622.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.53 : 669.50 = 417.20 : x
  2. Step 2: Convert to fraction form
    448.53/669.50 = 417.20/x
  3. Step 3: Cross multiply
    448.53x = 669.50 × 417.20
  4. Step 4: Simplify right side
    448.53x = 279,311.53
  5. Step 5: Solve for x
    x = 279,311.53/448.53
  6. Step 6: Final answer
    x = 622.73

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.