Home / 2,108.03-2,909.12-1,223.51

Finding the Fourth Proportional to 2,108.03, 2,909.12 and 1,223.51

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Solution

The fourth proportional to 2,108.03, 2,909.12 and 1,223.51 is: 1,688.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.03 : 2,909.12 = 1,223.51 : x
  2. Step 2: Convert to fraction form
    2,108.03/2,909.12 = 1,223.51/x
  3. Step 3: Cross multiply
    2,108.03x = 2,909.12 × 1,223.51
  4. Step 4: Simplify right side
    2,108.03x = 3,559,316.75
  5. Step 5: Solve for x
    x = 3,559,316.75/2,108.03
  6. Step 6: Final answer
    x = 1,688.46

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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.