Home / 1,515.38-2,091.31-1,010.35

Finding the Fourth Proportional to 1,515.38, 2,091.31 and 1,010.35

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Solution

The fourth proportional to 1,515.38, 2,091.31 and 1,010.35 is: 1,394.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.38 : 2,091.31 = 1,010.35 : x
  2. Step 2: Convert to fraction form
    1,515.38/2,091.31 = 1,010.35/x
  3. Step 3: Cross multiply
    1,515.38x = 2,091.31 × 1,010.35
  4. Step 4: Simplify right side
    1,515.38x = 2,112,955.15
  5. Step 5: Solve for x
    x = 2,112,955.15/1,515.38
  6. Step 6: Final answer
    x = 1,394.34

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Half scale
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Double scale
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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.