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Finding the Fourth Proportional to 443.51, 666.77 and 357.90

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Solution

The fourth proportional to 443.51, 666.77 and 357.90 is: 538.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.51 : 666.77 = 357.90 : x
  2. Step 2: Convert to fraction form
    443.51/666.77 = 357.90/x
  3. Step 3: Cross multiply
    443.51x = 666.77 × 357.90
  4. Step 4: Simplify right side
    443.51x = 238,635.19
  5. Step 5: Solve for x
    x = 238,635.19/443.51
  6. Step 6: Final answer
    x = 538.07

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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.