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Finding the Fourth Proportional to 716.56, 1,075.08 and 305.48

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Solution

The fourth proportional to 716.56, 1,075.08 and 305.48 is: 458.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.56 : 1,075.08 = 305.48 : x
  2. Step 2: Convert to fraction form
    716.56/1,075.08 = 305.48/x
  3. Step 3: Cross multiply
    716.56x = 1,075.08 × 305.48
  4. Step 4: Simplify right side
    716.56x = 328,415.44
  5. Step 5: Solve for x
    x = 328,415.44/716.56
  6. Step 6: Final answer
    x = 458.32

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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.