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Finding the Fourth Proportional to 1,810.59, 2,715.57 and 511.75

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Solution

The fourth proportional to 1,810.59, 2,715.57 and 511.75 is: 767.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,810.59 : 2,715.57 = 511.75 : x
  2. Step 2: Convert to fraction form
    1,810.59/2,715.57 = 511.75/x
  3. Step 3: Cross multiply
    1,810.59x = 2,715.57 × 511.75
  4. Step 4: Simplify right side
    1,810.59x = 1,389,692.95
  5. Step 5: Solve for x
    x = 1,389,692.95/1,810.59
  6. Step 6: Final answer
    x = 767.54

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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.