Home / 1,515.59-2,090.79-1,011.70

Finding the Fourth Proportional to 1,515.59, 2,090.79 and 1,011.70

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Solution

The fourth proportional to 1,515.59, 2,090.79 and 1,011.70 is: 1,395.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.59 : 2,090.79 = 1,011.70 : x
  2. Step 2: Convert to fraction form
    1,515.59/2,090.79 = 1,011.70/x
  3. Step 3: Cross multiply
    1,515.59x = 2,090.79 × 1,011.70
  4. Step 4: Simplify right side
    1,515.59x = 2,115,252.24
  5. Step 5: Solve for x
    x = 2,115,252.24/1,515.59
  6. Step 6: Final answer
    x = 1,395.66

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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.