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Finding the Fourth Proportional to 1,715.88, 2,575.28 and 676.61

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Solution

The fourth proportional to 1,715.88, 2,575.28 and 676.61 is: 1,015.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,715.88 : 2,575.28 = 676.61 : x
  2. Step 2: Convert to fraction form
    1,715.88/2,575.28 = 676.61/x
  3. Step 3: Cross multiply
    1,715.88x = 2,575.28 × 676.61
  4. Step 4: Simplify right side
    1,715.88x = 1,742,460.20
  5. Step 5: Solve for x
    x = 1,742,460.20/1,715.88
  6. Step 6: Final answer
    x = 1,015.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.