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Finding the Fourth Proportional to 1,590, 2,190.24 and 1,512.24

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Solution

The fourth proportional to 1,590, 2,190.24 and 1,512.24 is: 2,083.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590 : 2,190.24 = 1,512.24 : x
  2. Step 2: Convert to fraction form
    1,590/2,190.24 = 1,512.24/x
  3. Step 3: Cross multiply
    1,590x = 2,190.24 × 1,512.24
  4. Step 4: Simplify right side
    1,590x = 3,312,168.54
  5. Step 5: Solve for x
    x = 3,312,168.54/1,590
  6. Step 6: Final answer
    x = 2,083.12

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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.