Home / 3,128.78-4,317.96-1,802.91

Finding the Fourth Proportional to 3,128.78, 4,317.96 and 1,802.91

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Solution

The fourth proportional to 3,128.78, 4,317.96 and 1,802.91 is: 2,488.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.78 : 4,317.96 = 1,802.91 : x
  2. Step 2: Convert to fraction form
    3,128.78/4,317.96 = 1,802.91/x
  3. Step 3: Cross multiply
    3,128.78x = 4,317.96 × 1,802.91
  4. Step 4: Simplify right side
    3,128.78x = 7,784,881.79
  5. Step 5: Solve for x
    x = 7,784,881.79/3,128.78
  6. Step 6: Final answer
    x = 2,488.15

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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.