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Finding the Fourth Proportional to 3,907.68, 5,862.72 and 1,310.40

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Solution

The fourth proportional to 3,907.68, 5,862.72 and 1,310.40 is: 1,966.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.68 : 5,862.72 = 1,310.40 : x
  2. Step 2: Convert to fraction form
    3,907.68/5,862.72 = 1,310.40/x
  3. Step 3: Cross multiply
    3,907.68x = 5,862.72 × 1,310.40
  4. Step 4: Simplify right side
    3,907.68x = 7,682,508.29
  5. Step 5: Solve for x
    x = 7,682,508.29/3,907.68
  6. Step 6: Final answer
    x = 1,966.00

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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.