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Finding the Fourth Proportional to 384.18, 530 and 236.76

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Solution

The fourth proportional to 384.18, 530 and 236.76 is: 326.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.18 : 530 = 236.76 : x
  2. Step 2: Convert to fraction form
    384.18/530 = 236.76/x
  3. Step 3: Cross multiply
    384.18x = 530 × 236.76
  4. Step 4: Simplify right side
    384.18x = 125,482.80
  5. Step 5: Solve for x
    x = 125,482.80/384.18
  6. Step 6: Final answer
    x = 326.63

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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.