Home / 1,229.60-1,698.36-1,158.32

Finding the Fourth Proportional to 1,229.60, 1,698.36 and 1,158.32

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Solution

The fourth proportional to 1,229.60, 1,698.36 and 1,158.32 is: 1,599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.60 : 1,698.36 = 1,158.32 : x
  2. Step 2: Convert to fraction form
    1,229.60/1,698.36 = 1,158.32/x
  3. Step 3: Cross multiply
    1,229.60x = 1,698.36 × 1,158.32
  4. Step 4: Simplify right side
    1,229.60x = 1,967,244.36
  5. Step 5: Solve for x
    x = 1,967,244.36/1,229.60
  6. Step 6: Final answer
    x = 1,599.91

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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.