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Finding the Fourth Proportional to 694.64, 958.56 and 384.16

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Solution

The fourth proportional to 694.64, 958.56 and 384.16 is: 530.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.64 : 958.56 = 384.16 : x
  2. Step 2: Convert to fraction form
    694.64/958.56 = 384.16/x
  3. Step 3: Cross multiply
    694.64x = 958.56 × 384.16
  4. Step 4: Simplify right side
    694.64x = 368,240.41
  5. Step 5: Solve for x
    x = 368,240.41/694.64
  6. Step 6: Final answer
    x = 530.12

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Why These Related Problems?

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