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Finding the Fourth Proportional to 448.40, 618.18 and 336.53

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Solution

The fourth proportional to 448.40, 618.18 and 336.53 is: 463.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.40 : 618.18 = 336.53 : x
  2. Step 2: Convert to fraction form
    448.40/618.18 = 336.53/x
  3. Step 3: Cross multiply
    448.40x = 618.18 × 336.53
  4. Step 4: Simplify right side
    448.40x = 208,036.12
  5. Step 5: Solve for x
    x = 208,036.12/448.40
  6. Step 6: Final answer
    x = 463.95

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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.