Home / 1,220.32-1,839.64-1,139.98

Finding the Fourth Proportional to 1,220.32, 1,839.64 and 1,139.98

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Solution

The fourth proportional to 1,220.32, 1,839.64 and 1,139.98 is: 1,718.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.32 : 1,839.64 = 1,139.98 : x
  2. Step 2: Convert to fraction form
    1,220.32/1,839.64 = 1,139.98/x
  3. Step 3: Cross multiply
    1,220.32x = 1,839.64 × 1,139.98
  4. Step 4: Simplify right side
    1,220.32x = 2,097,152.81
  5. Step 5: Solve for x
    x = 2,097,152.81/1,220.32
  6. Step 6: Final answer
    x = 1,718.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.