Home / 1,767.77-2,439.60-981.89

Finding the Fourth Proportional to 1,767.77, 2,439.60 and 981.89

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Solution

The fourth proportional to 1,767.77, 2,439.60 and 981.89 is: 1,355.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.77 : 2,439.60 = 981.89 : x
  2. Step 2: Convert to fraction form
    1,767.77/2,439.60 = 981.89/x
  3. Step 3: Cross multiply
    1,767.77x = 2,439.60 × 981.89
  4. Step 4: Simplify right side
    1,767.77x = 2,395,418.84
  5. Step 5: Solve for x
    x = 2,395,418.84/1,767.77
  6. Step 6: Final answer
    x = 1,355.05

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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.