Home / 2,087.40-3,129.95-1,430.03

Finding the Fourth Proportional to 2,087.40, 3,129.95 and 1,430.03

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Solution

The fourth proportional to 2,087.40, 3,129.95 and 1,430.03 is: 2,144.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.40 : 3,129.95 = 1,430.03 : x
  2. Step 2: Convert to fraction form
    2,087.40/3,129.95 = 1,430.03/x
  3. Step 3: Cross multiply
    2,087.40x = 3,129.95 × 1,430.03
  4. Step 4: Simplify right side
    2,087.40x = 4,475,922.40
  5. Step 5: Solve for x
    x = 4,475,922.40/2,087.40
  6. Step 6: Final answer
    x = 2,144.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.