Home / 3,506.80-5,260.20-1,315.60

Finding the Fourth Proportional to 3,506.80, 5,260.20 and 1,315.60

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Solution

The fourth proportional to 3,506.80, 5,260.20 and 1,315.60 is: 1,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,506.80 : 5,260.20 = 1,315.60 : x
  2. Step 2: Convert to fraction form
    3,506.80/5,260.20 = 1,315.60/x
  3. Step 3: Cross multiply
    3,506.80x = 5,260.20 × 1,315.60
  4. Step 4: Simplify right side
    3,506.80x = 6,920,319.12
  5. Step 5: Solve for x
    x = 6,920,319.12/3,506.80
  6. Step 6: Final answer
    x = 1,973.40

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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.