Home / 1,771.20-2,445.12-1,108.42

Finding the Fourth Proportional to 1,771.20, 2,445.12 and 1,108.42

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Solution

The fourth proportional to 1,771.20, 2,445.12 and 1,108.42 is: 1,530.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.20 : 2,445.12 = 1,108.42 : x
  2. Step 2: Convert to fraction form
    1,771.20/2,445.12 = 1,108.42/x
  3. Step 3: Cross multiply
    1,771.20x = 2,445.12 × 1,108.42
  4. Step 4: Simplify right side
    1,771.20x = 2,710,213.80
  5. Step 5: Solve for x
    x = 2,710,213.80/1,771.20
  6. Step 6: Final answer
    x = 1,530.16

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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.