Home / 3,611.61-5,416.47-1,420.38

Finding the Fourth Proportional to 3,611.61, 5,416.47 and 1,420.38

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Solution

The fourth proportional to 3,611.61, 5,416.47 and 1,420.38 is: 2,130.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.61 : 5,416.47 = 1,420.38 : x
  2. Step 2: Convert to fraction form
    3,611.61/5,416.47 = 1,420.38/x
  3. Step 3: Cross multiply
    3,611.61x = 5,416.47 × 1,420.38
  4. Step 4: Simplify right side
    3,611.61x = 7,693,445.66
  5. Step 5: Solve for x
    x = 7,693,445.66/3,611.61
  6. Step 6: Final answer
    x = 2,130.20

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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.