Home / 1,681.36-2,320.31-935.39

Finding the Fourth Proportional to 1,681.36, 2,320.31 and 935.39

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Solution

The fourth proportional to 1,681.36, 2,320.31 and 935.39 is: 1,290.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.36 : 2,320.31 = 935.39 : x
  2. Step 2: Convert to fraction form
    1,681.36/2,320.31 = 935.39/x
  3. Step 3: Cross multiply
    1,681.36x = 2,320.31 × 935.39
  4. Step 4: Simplify right side
    1,681.36x = 2,170,385.51
  5. Step 5: Solve for x
    x = 2,170,385.51/1,681.36
  6. Step 6: Final answer
    x = 1,290.85

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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.