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Finding the Fourth Proportional to 385.18, 530.22 and 335.98

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Solution

The fourth proportional to 385.18, 530.22 and 335.98 is: 462.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.18 : 530.22 = 335.98 : x
  2. Step 2: Convert to fraction form
    385.18/530.22 = 335.98/x
  3. Step 3: Cross multiply
    385.18x = 530.22 × 335.98
  4. Step 4: Simplify right side
    385.18x = 178,139.40
  5. Step 5: Solve for x
    x = 178,139.40/385.18
  6. Step 6: Final answer
    x = 462.48

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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.