Home / 1,155.60-1,580.58-1,138.32

Finding the Fourth Proportional to 1,155.60, 1,580.58 and 1,138.32

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Solution

The fourth proportional to 1,155.60, 1,580.58 and 1,138.32 is: 1,556.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.60 : 1,580.58 = 1,138.32 : x
  2. Step 2: Convert to fraction form
    1,155.60/1,580.58 = 1,138.32/x
  3. Step 3: Cross multiply
    1,155.60x = 1,580.58 × 1,138.32
  4. Step 4: Simplify right side
    1,155.60x = 1,799,205.83
  5. Step 5: Solve for x
    x = 1,799,205.83/1,155.60
  6. Step 6: Final answer
    x = 1,556.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.