Home / 3,620.61-5,431.35-1,280.13

Finding the Fourth Proportional to 3,620.61, 5,431.35 and 1,280.13

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Solution

The fourth proportional to 3,620.61, 5,431.35 and 1,280.13 is: 1,920.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.61 : 5,431.35 = 1,280.13 : x
  2. Step 2: Convert to fraction form
    3,620.61/5,431.35 = 1,280.13/x
  3. Step 3: Cross multiply
    3,620.61x = 5,431.35 × 1,280.13
  4. Step 4: Simplify right side
    3,620.61x = 6,952,827.67
  5. Step 5: Solve for x
    x = 6,952,827.67/3,620.61
  6. Step 6: Final answer
    x = 1,920.35

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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.