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Finding the Fourth Proportional to 385.00, 530.56 and 279.98

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Solution

The fourth proportional to 385.00, 530.56 and 279.98 is: 385.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.00 : 530.56 = 279.98 : x
  2. Step 2: Convert to fraction form
    385.00/530.56 = 279.98/x
  3. Step 3: Cross multiply
    385.00x = 530.56 × 279.98
  4. Step 4: Simplify right side
    385.00x = 148,544.30
  5. Step 5: Solve for x
    x = 148,544.30/385.00
  6. Step 6: Final answer
    x = 385.83

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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.