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Finding the Fourth Proportional to 448.02, 618.04 and 290.45

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Solution

The fourth proportional to 448.02, 618.04 and 290.45 is: 400.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.02 : 618.04 = 290.45 : x
  2. Step 2: Convert to fraction form
    448.02/618.04 = 290.45/x
  3. Step 3: Cross multiply
    448.02x = 618.04 × 290.45
  4. Step 4: Simplify right side
    448.02x = 179,510.54
  5. Step 5: Solve for x
    x = 179,510.54/448.02
  6. Step 6: Final answer
    x = 400.68

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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.