Home / 3,615.55-5,421.90-1,275.05

Finding the Fourth Proportional to 3,615.55, 5,421.90 and 1,275.05

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Solution

The fourth proportional to 3,615.55, 5,421.90 and 1,275.05 is: 1,912.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.55 : 5,421.90 = 1,275.05 : x
  2. Step 2: Convert to fraction form
    3,615.55/5,421.90 = 1,275.05/x
  3. Step 3: Cross multiply
    3,615.55x = 5,421.90 × 1,275.05
  4. Step 4: Simplify right side
    3,615.55x = 6,913,211.93
  5. Step 5: Solve for x
    x = 6,913,211.93/3,615.55
  6. Step 6: Final answer
    x = 1,912.08

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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.