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Finding the Fourth Proportional to 384.37, 530.40 and 218.57

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Solution

The fourth proportional to 384.37, 530.40 and 218.57 is: 301.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.37 : 530.40 = 218.57 : x
  2. Step 2: Convert to fraction form
    384.37/530.40 = 218.57/x
  3. Step 3: Cross multiply
    384.37x = 530.40 × 218.57
  4. Step 4: Simplify right side
    384.37x = 115,929.76
  5. Step 5: Solve for x
    x = 115,929.76/384.37
  6. Step 6: Final answer
    x = 301.61

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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.