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Finding the Fourth Proportional to 716.77, 1,075.76 and 511.84

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Solution

The fourth proportional to 716.77, 1,075.76 and 511.84 is: 768.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.77 : 1,075.76 = 511.84 : x
  2. Step 2: Convert to fraction form
    716.77/1,075.76 = 511.84/x
  3. Step 3: Cross multiply
    716.77x = 1,075.76 × 511.84
  4. Step 4: Simplify right side
    716.77x = 550,617.00
  5. Step 5: Solve for x
    x = 550,617.00/716.77
  6. Step 6: Final answer
    x = 768.19

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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.