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Finding the Fourth Proportional to 3,645.07, 5,030.19 and 1,989.07

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Solution

The fourth proportional to 3,645.07, 5,030.19 and 1,989.07 is: 2,744.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,645.07 : 5,030.19 = 1,989.07 : x
  2. Step 2: Convert to fraction form
    3,645.07/5,030.19 = 1,989.07/x
  3. Step 3: Cross multiply
    3,645.07x = 5,030.19 × 1,989.07
  4. Step 4: Simplify right side
    3,645.07x = 10,005,400.02
  5. Step 5: Solve for x
    x = 10,005,400.02/3,645.07
  6. Step 6: Final answer
    x = 2,744.91

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1.5x scale

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.