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Finding the Fourth Proportional to 1,672.98, 2,309.13 and 1,075.43

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Solution

The fourth proportional to 1,672.98, 2,309.13 and 1,075.43 is: 1,484.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.98 : 2,309.13 = 1,075.43 : x
  2. Step 2: Convert to fraction form
    1,672.98/2,309.13 = 1,075.43/x
  3. Step 3: Cross multiply
    1,672.98x = 2,309.13 × 1,075.43
  4. Step 4: Simplify right side
    1,672.98x = 2,483,296.13
  5. Step 5: Solve for x
    x = 2,483,296.13/1,672.98
  6. Step 6: Final answer
    x = 1,484.35

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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.