Home / 2,590.19-3,885.23-1,128.99

Finding the Fourth Proportional to 2,590.19, 3,885.23 and 1,128.99

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Solution

The fourth proportional to 2,590.19, 3,885.23 and 1,128.99 is: 1,693.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.19 : 3,885.23 = 1,128.99 : x
  2. Step 2: Convert to fraction form
    2,590.19/3,885.23 = 1,128.99/x
  3. Step 3: Cross multiply
    2,590.19x = 3,885.23 × 1,128.99
  4. Step 4: Simplify right side
    2,590.19x = 4,386,388.64
  5. Step 5: Solve for x
    x = 4,386,388.64/2,590.19
  6. Step 6: Final answer
    x = 1,693.47

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.