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Finding the Fourth Proportional to 1,515.34, 2,090.94 and 852.10

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Solution

The fourth proportional to 1,515.34, 2,090.94 and 852.10 is: 1,175.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.34 : 2,090.94 = 852.10 : x
  2. Step 2: Convert to fraction form
    1,515.34/2,090.94 = 852.10/x
  3. Step 3: Cross multiply
    1,515.34x = 2,090.94 × 852.10
  4. Step 4: Simplify right side
    1,515.34x = 1,781,689.97
  5. Step 5: Solve for x
    x = 1,781,689.97/1,515.34
  6. Step 6: Final answer
    x = 1,175.77

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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.