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Finding the Fourth Proportional to 2,760.64, 3,809.28 and 1,830.40

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Solution

The fourth proportional to 2,760.64, 3,809.28 and 1,830.40 is: 2,525.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,760.64 : 3,809.28 = 1,830.40 : x
  2. Step 2: Convert to fraction form
    2,760.64/3,809.28 = 1,830.40/x
  3. Step 3: Cross multiply
    2,760.64x = 3,809.28 × 1,830.40
  4. Step 4: Simplify right side
    2,760.64x = 6,972,506.11
  5. Step 5: Solve for x
    x = 6,972,506.11/2,760.64
  6. Step 6: Final answer
    x = 2,525.68

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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.