Home / 1,355.80-2,033.70-1,323.40

Finding the Fourth Proportional to 1,355.80, 2,033.70 and 1,323.40

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Solution

The fourth proportional to 1,355.80, 2,033.70 and 1,323.40 is: 1,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.80 : 2,033.70 = 1,323.40 : x
  2. Step 2: Convert to fraction form
    1,355.80/2,033.70 = 1,323.40/x
  3. Step 3: Cross multiply
    1,355.80x = 2,033.70 × 1,323.40
  4. Step 4: Simplify right side
    1,355.80x = 2,691,398.58
  5. Step 5: Solve for x
    x = 2,691,398.58/1,355.80
  6. Step 6: Final answer
    x = 1,985.10

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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.