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Finding the Fourth Proportional to 1,075.21, 1,484 and 633.49

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Solution

The fourth proportional to 1,075.21, 1,484 and 633.49 is: 874.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.21 : 1,484 = 633.49 : x
  2. Step 2: Convert to fraction form
    1,075.21/1,484 = 633.49/x
  3. Step 3: Cross multiply
    1,075.21x = 1,484 × 633.49
  4. Step 4: Simplify right side
    1,075.21x = 940,099.16
  5. Step 5: Solve for x
    x = 940,099.16/1,075.21
  6. Step 6: Final answer
    x = 874.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.