Home / 1,578.40-2,180.40-1,495.36

Finding the Fourth Proportional to 1,578.40, 2,180.40 and 1,495.36

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Solution

The fourth proportional to 1,578.40, 2,180.40 and 1,495.36 is: 2,065.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.40 : 2,180.40 = 1,495.36 : x
  2. Step 2: Convert to fraction form
    1,578.40/2,180.40 = 1,495.36/x
  3. Step 3: Cross multiply
    1,578.40x = 2,180.40 × 1,495.36
  4. Step 4: Simplify right side
    1,578.40x = 3,260,464.57
  5. Step 5: Solve for x
    x = 3,260,464.57/1,578.40
  6. Step 6: Final answer
    x = 2,065.68

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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.