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Finding the Fourth Proportional to 461.63, 692.85 and 256.64

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Solution

The fourth proportional to 461.63, 692.85 and 256.64 is: 385.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.63 : 692.85 = 256.64 : x
  2. Step 2: Convert to fraction form
    461.63/692.85 = 256.64/x
  3. Step 3: Cross multiply
    461.63x = 692.85 × 256.64
  4. Step 4: Simplify right side
    461.63x = 177,810.52
  5. Step 5: Solve for x
    x = 177,810.52/461.63
  6. Step 6: Final answer
    x = 385.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.