Home / 1,440.07-1,987.65-1,020.49

Finding the Fourth Proportional to 1,440.07, 1,987.65 and 1,020.49

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Solution

The fourth proportional to 1,440.07, 1,987.65 and 1,020.49 is: 1,408.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.07 : 1,987.65 = 1,020.49 : x
  2. Step 2: Convert to fraction form
    1,440.07/1,987.65 = 1,020.49/x
  3. Step 3: Cross multiply
    1,440.07x = 1,987.65 × 1,020.49
  4. Step 4: Simplify right side
    1,440.07x = 2,028,371.98
  5. Step 5: Solve for x
    x = 2,028,371.98/1,440.07
  6. Step 6: Final answer
    x = 1,408.53

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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.