Home / 1,579.99-2,180.61-1,139.35

Finding the Fourth Proportional to 1,579.99, 2,180.61 and 1,139.35

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Solution

The fourth proportional to 1,579.99, 2,180.61 and 1,139.35 is: 1,572.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.99 : 2,180.61 = 1,139.35 : x
  2. Step 2: Convert to fraction form
    1,579.99/2,180.61 = 1,139.35/x
  3. Step 3: Cross multiply
    1,579.99x = 2,180.61 × 1,139.35
  4. Step 4: Simplify right side
    1,579.99x = 2,484,478.00
  5. Step 5: Solve for x
    x = 2,484,478.00/1,579.99
  6. Step 6: Final answer
    x = 1,572.46

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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.