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Finding the Fourth Proportional to 2,920.40, 4,385.40 and 1,950.80

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Solution

The fourth proportional to 2,920.40, 4,385.40 and 1,950.80 is: 2,929.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.40 : 4,385.40 = 1,950.80 : x
  2. Step 2: Convert to fraction form
    2,920.40/4,385.40 = 1,950.80/x
  3. Step 3: Cross multiply
    2,920.40x = 4,385.40 × 1,950.80
  4. Step 4: Simplify right side
    2,920.40x = 8,555,038.32
  5. Step 5: Solve for x
    x = 8,555,038.32/2,920.40
  6. Step 6: Final answer
    x = 2,929.41

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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.