Home / 1,478.06-2,039.91-1,228.95

Finding the Fourth Proportional to 1,478.06, 2,039.91 and 1,228.95

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Solution

The fourth proportional to 1,478.06, 2,039.91 and 1,228.95 is: 1,696.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.06 : 2,039.91 = 1,228.95 : x
  2. Step 2: Convert to fraction form
    1,478.06/2,039.91 = 1,228.95/x
  3. Step 3: Cross multiply
    1,478.06x = 2,039.91 × 1,228.95
  4. Step 4: Simplify right side
    1,478.06x = 2,506,947.39
  5. Step 5: Solve for x
    x = 2,506,947.39/1,478.06
  6. Step 6: Final answer
    x = 1,696.11

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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.