Home / 1,535.40-2,116.80-1,324.80

Finding the Fourth Proportional to 1,535.40, 2,116.80 and 1,324.80

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Solution

The fourth proportional to 1,535.40, 2,116.80 and 1,324.80 is: 1,826.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.40 : 2,116.80 = 1,324.80 : x
  2. Step 2: Convert to fraction form
    1,535.40/2,116.80 = 1,324.80/x
  3. Step 3: Cross multiply
    1,535.40x = 2,116.80 × 1,324.80
  4. Step 4: Simplify right side
    1,535.40x = 2,804,336.64
  5. Step 5: Solve for x
    x = 2,804,336.64/1,535.40
  6. Step 6: Final answer
    x = 1,826.45

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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.