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Finding the Fourth Proportional to 2,513.30, 3,769.07 and 869.40

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Solution

The fourth proportional to 2,513.30, 3,769.07 and 869.40 is: 1,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,513.30 : 3,769.07 = 869.40 : x
  2. Step 2: Convert to fraction form
    2,513.30/3,769.07 = 869.40/x
  3. Step 3: Cross multiply
    2,513.30x = 3,769.07 × 869.40
  4. Step 4: Simplify right side
    2,513.30x = 3,276,825.11
  5. Step 5: Solve for x
    x = 3,276,825.11/2,513.30
  6. Step 6: Final answer
    x = 1,303.80

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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.