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Finding the Fourth Proportional to 384.54, 530.91 and 343.50

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Solution

The fourth proportional to 384.54, 530.91 and 343.50 is: 474.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.54 : 530.91 = 343.50 : x
  2. Step 2: Convert to fraction form
    384.54/530.91 = 343.50/x
  3. Step 3: Cross multiply
    384.54x = 530.91 × 343.50
  4. Step 4: Simplify right side
    384.54x = 182,367.59
  5. Step 5: Solve for x
    x = 182,367.59/384.54
  6. Step 6: Final answer
    x = 474.25

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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.