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Finding the Fourth Proportional to 448.42, 670.54 and 399.95

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Solution

The fourth proportional to 448.42, 670.54 and 399.95 is: 598.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.42 : 670.54 = 399.95 : x
  2. Step 2: Convert to fraction form
    448.42/670.54 = 399.95/x
  3. Step 3: Cross multiply
    448.42x = 670.54 × 399.95
  4. Step 4: Simplify right side
    448.42x = 268,182.47
  5. Step 5: Solve for x
    x = 268,182.47/448.42
  6. Step 6: Final answer
    x = 598.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.