Home / 1,681.67-2,320.90-935.70

Finding the Fourth Proportional to 1,681.67, 2,320.90 and 935.70

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Solution

The fourth proportional to 1,681.67, 2,320.90 and 935.70 is: 1,291.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.67 : 2,320.90 = 935.70 : x
  2. Step 2: Convert to fraction form
    1,681.67/2,320.90 = 935.70/x
  3. Step 3: Cross multiply
    1,681.67x = 2,320.90 × 935.70
  4. Step 4: Simplify right side
    1,681.67x = 2,171,666.13
  5. Step 5: Solve for x
    x = 2,171,666.13/1,681.67
  6. Step 6: Final answer
    x = 1,291.37

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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.