Home / 1,778.07-2,453.61-981.36

Finding the Fourth Proportional to 1,778.07, 2,453.61 and 981.36

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Solution

The fourth proportional to 1,778.07, 2,453.61 and 981.36 is: 1,354.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.07 : 2,453.61 = 981.36 : x
  2. Step 2: Convert to fraction form
    1,778.07/2,453.61 = 981.36/x
  3. Step 3: Cross multiply
    1,778.07x = 2,453.61 × 981.36
  4. Step 4: Simplify right side
    1,778.07x = 2,407,874.71
  5. Step 5: Solve for x
    x = 2,407,874.71/1,778.07
  6. Step 6: Final answer
    x = 1,354.21

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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.