Home / 1,513.53-2,090.81-1,440.63

Finding the Fourth Proportional to 1,513.53, 2,090.81 and 1,440.63

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Solution

The fourth proportional to 1,513.53, 2,090.81 and 1,440.63 is: 1,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.53 : 2,090.81 = 1,440.63 : x
  2. Step 2: Convert to fraction form
    1,513.53/2,090.81 = 1,440.63/x
  3. Step 3: Cross multiply
    1,513.53x = 2,090.81 × 1,440.63
  4. Step 4: Simplify right side
    1,513.53x = 3,012,087.21
  5. Step 5: Solve for x
    x = 3,012,087.21/1,513.53
  6. Step 6: Final answer
    x = 1,990.11

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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.