Home / 3,128.47-4,317.49-1,802.15

Finding the Fourth Proportional to 3,128.47, 4,317.49 and 1,802.15

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Solution

The fourth proportional to 3,128.47, 4,317.49 and 1,802.15 is: 2,487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.47 : 4,317.49 = 1,802.15 : x
  2. Step 2: Convert to fraction form
    3,128.47/4,317.49 = 1,802.15/x
  3. Step 3: Cross multiply
    3,128.47x = 4,317.49 × 1,802.15
  4. Step 4: Simplify right side
    3,128.47x = 7,780,751.32
  5. Step 5: Solve for x
    x = 7,780,751.32/3,128.47
  6. Step 6: Final answer
    x = 2,487.08

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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.