Home / 5,280.80-7,290.42-3,515

Finding the Fourth Proportional to 5,280.80, 7,290.42 and 3,515

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Solution

The fourth proportional to 5,280.80, 7,290.42 and 3,515 is: 4,852.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.80 : 7,290.42 = 3,515 : x
  2. Step 2: Convert to fraction form
    5,280.80/7,290.42 = 3,515/x
  3. Step 3: Cross multiply
    5,280.80x = 7,290.42 × 3,515
  4. Step 4: Simplify right side
    5,280.80x = 25,625,826.30
  5. Step 5: Solve for x
    x = 25,625,826.30/5,280.80
  6. Step 6: Final answer
    x = 4,852.64

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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.