Home / 1,681.45-2,320.55-935.39

Finding the Fourth Proportional to 1,681.45, 2,320.55 and 935.39

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Solution

The fourth proportional to 1,681.45, 2,320.55 and 935.39 is: 1,290.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.45 : 2,320.55 = 935.39 : x
  2. Step 2: Convert to fraction form
    1,681.45/2,320.55 = 935.39/x
  3. Step 3: Cross multiply
    1,681.45x = 2,320.55 × 935.39
  4. Step 4: Simplify right side
    1,681.45x = 2,170,619.26
  5. Step 5: Solve for x
    x = 2,170,619.26/1,681.45
  6. Step 6: Final answer
    x = 1,290.92

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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.