Home / 1,405.09-1,941.60-1,217.98

Finding the Fourth Proportional to 1,405.09, 1,941.60 and 1,217.98

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Solution

The fourth proportional to 1,405.09, 1,941.60 and 1,217.98 is: 1,683.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.09 : 1,941.60 = 1,217.98 : x
  2. Step 2: Convert to fraction form
    1,405.09/1,941.60 = 1,217.98/x
  3. Step 3: Cross multiply
    1,405.09x = 1,941.60 × 1,217.98
  4. Step 4: Simplify right side
    1,405.09x = 2,364,829.97
  5. Step 5: Solve for x
    x = 2,364,829.97/1,405.09
  6. Step 6: Final answer
    x = 1,683.05

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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.