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Finding the Fourth Proportional to 448.02, 672.09 and 155.55

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Solution

The fourth proportional to 448.02, 672.09 and 155.55 is: 233.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.02 : 672.09 = 155.55 : x
  2. Step 2: Convert to fraction form
    448.02/672.09 = 155.55/x
  3. Step 3: Cross multiply
    448.02x = 672.09 × 155.55
  4. Step 4: Simplify right side
    448.02x = 104,543.60
  5. Step 5: Solve for x
    x = 104,543.60/448.02
  6. Step 6: Final answer
    x = 233.35

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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.