Home / 3,128.71-4,317.58-1,712.42

Finding the Fourth Proportional to 3,128.71, 4,317.58 and 1,712.42

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Solution

The fourth proportional to 3,128.71, 4,317.58 and 1,712.42 is: 2,363.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.71 : 4,317.58 = 1,712.42 : x
  2. Step 2: Convert to fraction form
    3,128.71/4,317.58 = 1,712.42/x
  3. Step 3: Cross multiply
    3,128.71x = 4,317.58 × 1,712.42
  4. Step 4: Simplify right side
    3,128.71x = 7,393,510.34
  5. Step 5: Solve for x
    x = 7,393,510.34/3,128.71
  6. Step 6: Final answer
    x = 2,363.12

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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.