Home / 1,590.92-2,190.48-1,445.12

Finding the Fourth Proportional to 1,590.92, 2,190.48 and 1,445.12

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Solution

The fourth proportional to 1,590.92, 2,190.48 and 1,445.12 is: 1,989.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.92 : 2,190.48 = 1,445.12 : x
  2. Step 2: Convert to fraction form
    1,590.92/2,190.48 = 1,445.12/x
  3. Step 3: Cross multiply
    1,590.92x = 2,190.48 × 1,445.12
  4. Step 4: Simplify right side
    1,590.92x = 3,165,506.46
  5. Step 5: Solve for x
    x = 3,165,506.46/1,590.92
  6. Step 6: Final answer
    x = 1,989.73

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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.