Home / 1,767.09-2,438.64-981.20

Finding the Fourth Proportional to 1,767.09, 2,438.64 and 981.20

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Solution

The fourth proportional to 1,767.09, 2,438.64 and 981.20 is: 1,354.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.09 : 2,438.64 = 981.20 : x
  2. Step 2: Convert to fraction form
    1,767.09/2,438.64 = 981.20/x
  3. Step 3: Cross multiply
    1,767.09x = 2,438.64 × 981.20
  4. Step 4: Simplify right side
    1,767.09x = 2,392,781.37
  5. Step 5: Solve for x
    x = 2,392,781.37/1,767.09
  6. Step 6: Final answer
    x = 1,354.08

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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.