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Finding the Fourth Proportional to 423.81, 638.26 and 373.01

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Solution

The fourth proportional to 423.81, 638.26 and 373.01 is: 561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.81 : 638.26 = 373.01 : x
  2. Step 2: Convert to fraction form
    423.81/638.26 = 373.01/x
  3. Step 3: Cross multiply
    423.81x = 638.26 × 373.01
  4. Step 4: Simplify right side
    423.81x = 238,078.66
  5. Step 5: Solve for x
    x = 238,078.66/423.81
  6. Step 6: Final answer
    x = 561.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.