Home / 1,615.41-2,228.72-985.77

Finding the Fourth Proportional to 1,615.41, 2,228.72 and 985.77

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Solution

The fourth proportional to 1,615.41, 2,228.72 and 985.77 is: 1,360.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.41 : 2,228.72 = 985.77 : x
  2. Step 2: Convert to fraction form
    1,615.41/2,228.72 = 985.77/x
  3. Step 3: Cross multiply
    1,615.41x = 2,228.72 × 985.77
  4. Step 4: Simplify right side
    1,615.41x = 2,197,000.39
  5. Step 5: Solve for x
    x = 2,197,000.39/1,615.41
  6. Step 6: Final answer
    x = 1,360.03

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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.