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Finding the Fourth Proportional to 291, 433.64 and 283.08

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Solution

The fourth proportional to 291, 433.64 and 283.08 is: 421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291 : 433.64 = 283.08 : x
  2. Step 2: Convert to fraction form
    291/433.64 = 283.08/x
  3. Step 3: Cross multiply
    291x = 433.64 × 283.08
  4. Step 4: Simplify right side
    291x = 122,754.81
  5. Step 5: Solve for x
    x = 122,754.81/291
  6. Step 6: Final answer
    x = 421.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.