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Finding the Fourth Proportional to 2,600.50, 3,900.88 and 869.26

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Solution

The fourth proportional to 2,600.50, 3,900.88 and 869.26 is: 1,303.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,600.50 : 3,900.88 = 869.26 : x
  2. Step 2: Convert to fraction form
    2,600.50/3,900.88 = 869.26/x
  3. Step 3: Cross multiply
    2,600.50x = 3,900.88 × 869.26
  4. Step 4: Simplify right side
    2,600.50x = 3,390,878.95
  5. Step 5: Solve for x
    x = 3,390,878.95/2,600.50
  6. Step 6: Final answer
    x = 1,303.93

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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.