Home / 1,627.10-2,245.20-918.90

Finding the Fourth Proportional to 1,627.10, 2,245.20 and 918.90

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Solution

The fourth proportional to 1,627.10, 2,245.20 and 918.90 is: 1,267.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.10 : 2,245.20 = 918.90 : x
  2. Step 2: Convert to fraction form
    1,627.10/2,245.20 = 918.90/x
  3. Step 3: Cross multiply
    1,627.10x = 2,245.20 × 918.90
  4. Step 4: Simplify right side
    1,627.10x = 2,063,114.28
  5. Step 5: Solve for x
    x = 2,063,114.28/1,627.10
  6. Step 6: Final answer
    x = 1,267.97

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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.