Home / 2,108.40-2,909.16-1,611.60

Finding the Fourth Proportional to 2,108.40, 2,909.16 and 1,611.60

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Solution

The fourth proportional to 2,108.40, 2,909.16 and 1,611.60 is: 2,223.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.40 : 2,909.16 = 1,611.60 : x
  2. Step 2: Convert to fraction form
    2,108.40/2,909.16 = 1,611.60/x
  3. Step 3: Cross multiply
    2,108.40x = 2,909.16 × 1,611.60
  4. Step 4: Simplify right side
    2,108.40x = 4,688,402.26
  5. Step 5: Solve for x
    x = 4,688,402.26/2,108.40
  6. Step 6: Final answer
    x = 2,223.68

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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.