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Finding the Fourth Proportional to 1,515.62, 2,090.92 and 1,018.42

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Solution

The fourth proportional to 1,515.62, 2,090.92 and 1,018.42 is: 1,404.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.62 : 2,090.92 = 1,018.42 : x
  2. Step 2: Convert to fraction form
    1,515.62/2,090.92 = 1,018.42/x
  3. Step 3: Cross multiply
    1,515.62x = 2,090.92 × 1,018.42
  4. Step 4: Simplify right side
    1,515.62x = 2,129,434.75
  5. Step 5: Solve for x
    x = 2,129,434.75/1,515.62
  6. Step 6: Final answer
    x = 1,404.99

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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.