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Finding the Fourth Proportional to 5,007.90, 7,512 and 1,720.95

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Solution

The fourth proportional to 5,007.90, 7,512 and 1,720.95 is: 2,581.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,007.90 : 7,512 = 1,720.95 : x
  2. Step 2: Convert to fraction form
    5,007.90/7,512 = 1,720.95/x
  3. Step 3: Cross multiply
    5,007.90x = 7,512 × 1,720.95
  4. Step 4: Simplify right side
    5,007.90x = 12,927,776.40
  5. Step 5: Solve for x
    x = 12,927,776.40/5,007.90
  6. Step 6: Final answer
    x = 2,581.48

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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.