Home / 1,628.40-2,437.86-1,278.48

Finding the Fourth Proportional to 1,628.40, 2,437.86 and 1,278.48

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Solution

The fourth proportional to 1,628.40, 2,437.86 and 1,278.48 is: 1,914.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.40 : 2,437.86 = 1,278.48 : x
  2. Step 2: Convert to fraction form
    1,628.40/2,437.86 = 1,278.48/x
  3. Step 3: Cross multiply
    1,628.40x = 2,437.86 × 1,278.48
  4. Step 4: Simplify right side
    1,628.40x = 3,116,755.25
  5. Step 5: Solve for x
    x = 3,116,755.25/1,628.40
  6. Step 6: Final answer
    x = 1,914.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.