Home / 1,515.63-2,091.69-926.31

Finding the Fourth Proportional to 1,515.63, 2,091.69 and 926.31

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Solution

The fourth proportional to 1,515.63, 2,091.69 and 926.31 is: 1,278.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.63 : 2,091.69 = 926.31 : x
  2. Step 2: Convert to fraction form
    1,515.63/2,091.69 = 926.31/x
  3. Step 3: Cross multiply
    1,515.63x = 2,091.69 × 926.31
  4. Step 4: Simplify right side
    1,515.63x = 1,937,553.36
  5. Step 5: Solve for x
    x = 1,937,553.36/1,515.63
  6. Step 6: Final answer
    x = 1,278.38

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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.