Home / 2,187.39-3,015.79-1,558.63

Finding the Fourth Proportional to 2,187.39, 3,015.79 and 1,558.63

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Solution

The fourth proportional to 2,187.39, 3,015.79 and 1,558.63 is: 2,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.39 : 3,015.79 = 1,558.63 : x
  2. Step 2: Convert to fraction form
    2,187.39/3,015.79 = 1,558.63/x
  3. Step 3: Cross multiply
    2,187.39x = 3,015.79 × 1,558.63
  4. Step 4: Simplify right side
    2,187.39x = 4,700,500.77
  5. Step 5: Solve for x
    x = 4,700,500.77/2,187.39
  6. Step 6: Final answer
    x = 2,148.91

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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.