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Finding the Fourth Proportional to 421.84, 581.88 and 266.68

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Solution

The fourth proportional to 421.84, 581.88 and 266.68 is: 367.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.84 : 581.88 = 266.68 : x
  2. Step 2: Convert to fraction form
    421.84/581.88 = 266.68/x
  3. Step 3: Cross multiply
    421.84x = 581.88 × 266.68
  4. Step 4: Simplify right side
    421.84x = 155,175.76
  5. Step 5: Solve for x
    x = 155,175.76/421.84
  6. Step 6: Final answer
    x = 367.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.