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Finding the Fourth Proportional to 774.16, 1,075.49 and 766.96

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Solution

The fourth proportional to 774.16, 1,075.49 and 766.96 is: 1,065.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.16 : 1,075.49 = 766.96 : x
  2. Step 2: Convert to fraction form
    774.16/1,075.49 = 766.96/x
  3. Step 3: Cross multiply
    774.16x = 1,075.49 × 766.96
  4. Step 4: Simplify right side
    774.16x = 824,852.43
  5. Step 5: Solve for x
    x = 824,852.43/774.16
  6. Step 6: Final answer
    x = 1,065.49

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.