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Finding the Fourth Proportional to 2,920.11, 4,377.36 and 970.94

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Solution

The fourth proportional to 2,920.11, 4,377.36 and 970.94 is: 1,455.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.11 : 4,377.36 = 970.94 : x
  2. Step 2: Convert to fraction form
    2,920.11/4,377.36 = 970.94/x
  3. Step 3: Cross multiply
    2,920.11x = 4,377.36 × 970.94
  4. Step 4: Simplify right side
    2,920.11x = 4,250,153.92
  5. Step 5: Solve for x
    x = 4,250,153.92/2,920.11
  6. Step 6: Final answer
    x = 1,455.48

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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.