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Finding the Fourth Proportional to 1,681.83, 2,320.85 and 935.84

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Solution

The fourth proportional to 1,681.83, 2,320.85 and 935.84 is: 1,291.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.83 : 2,320.85 = 935.84 : x
  2. Step 2: Convert to fraction form
    1,681.83/2,320.85 = 935.84/x
  3. Step 3: Cross multiply
    1,681.83x = 2,320.85 × 935.84
  4. Step 4: Simplify right side
    1,681.83x = 2,171,952.41
  5. Step 5: Solve for x
    x = 2,171,952.41/1,681.83
  6. Step 6: Final answer
    x = 1,291.42

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Double scale
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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.