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Finding the Fourth Proportional to 512.55, 692.55 and 512.55

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Solution

The fourth proportional to 512.55, 692.55 and 512.55 is: 692.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.55 : 692.55 = 512.55 : x
  2. Step 2: Convert to fraction form
    512.55/692.55 = 512.55/x
  3. Step 3: Cross multiply
    512.55x = 692.55 × 512.55
  4. Step 4: Simplify right side
    512.55x = 354,966.50
  5. Step 5: Solve for x
    x = 354,966.50/512.55
  6. Step 6: Final answer
    x = 692.55

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.