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Finding the Fourth Proportional to 448.79, 619.45 and 418.01

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Solution

The fourth proportional to 448.79, 619.45 and 418.01 is: 576.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.79 : 619.45 = 418.01 : x
  2. Step 2: Convert to fraction form
    448.79/619.45 = 418.01/x
  3. Step 3: Cross multiply
    448.79x = 619.45 × 418.01
  4. Step 4: Simplify right side
    448.79x = 258,935.64
  5. Step 5: Solve for x
    x = 258,935.64/448.79
  6. Step 6: Final answer
    x = 576.96

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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.