Home / 1,420.12-2,131.73-1,048.79

Finding the Fourth Proportional to 1,420.12, 2,131.73 and 1,048.79

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Solution

The fourth proportional to 1,420.12, 2,131.73 and 1,048.79 is: 1,574.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.12 : 2,131.73 = 1,048.79 : x
  2. Step 2: Convert to fraction form
    1,420.12/2,131.73 = 1,048.79/x
  3. Step 3: Cross multiply
    1,420.12x = 2,131.73 × 1,048.79
  4. Step 4: Simplify right side
    1,420.12x = 2,235,721.20
  5. Step 5: Solve for x
    x = 2,235,721.20/1,420.12
  6. Step 6: Final answer
    x = 1,574.32

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1.5x scale

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.