Home / 1,681.11-2,320.20-972.99

Finding the Fourth Proportional to 1,681.11, 2,320.20 and 972.99

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Solution

The fourth proportional to 1,681.11, 2,320.20 and 972.99 is: 1,342.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.11 : 2,320.20 = 972.99 : x
  2. Step 2: Convert to fraction form
    1,681.11/2,320.20 = 972.99/x
  3. Step 3: Cross multiply
    1,681.11x = 2,320.20 × 972.99
  4. Step 4: Simplify right side
    1,681.11x = 2,257,531.40
  5. Step 5: Solve for x
    x = 2,257,531.40/1,681.11
  6. Step 6: Final answer
    x = 1,342.88

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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.