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Finding the Fourth Proportional to 1,648.38, 2,274.76 and 912.38

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Solution

The fourth proportional to 1,648.38, 2,274.76 and 912.38 is: 1,259.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648.38 : 2,274.76 = 912.38 : x
  2. Step 2: Convert to fraction form
    1,648.38/2,274.76 = 912.38/x
  3. Step 3: Cross multiply
    1,648.38x = 2,274.76 × 912.38
  4. Step 4: Simplify right side
    1,648.38x = 2,075,431.87
  5. Step 5: Solve for x
    x = 2,075,431.87/1,648.38
  6. Step 6: Final answer
    x = 1,259.08

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1.5x scale

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.