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Finding the Fourth Proportional to 2,513.80, 3,771.16 and 869.90

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Solution

The fourth proportional to 2,513.80, 3,771.16 and 869.90 is: 1,305.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,513.80 : 3,771.16 = 869.90 : x
  2. Step 2: Convert to fraction form
    2,513.80/3,771.16 = 869.90/x
  3. Step 3: Cross multiply
    2,513.80x = 3,771.16 × 869.90
  4. Step 4: Simplify right side
    2,513.80x = 3,280,532.08
  5. Step 5: Solve for x
    x = 3,280,532.08/2,513.80
  6. Step 6: Final answer
    x = 1,305.01

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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.