Home / 4,128.60-6,192.72-1,207.20

Finding the Fourth Proportional to 4,128.60, 6,192.72 and 1,207.20

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Solution

The fourth proportional to 4,128.60, 6,192.72 and 1,207.20 is: 1,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,128.60 : 6,192.72 = 1,207.20 : x
  2. Step 2: Convert to fraction form
    4,128.60/6,192.72 = 1,207.20/x
  3. Step 3: Cross multiply
    4,128.60x = 6,192.72 × 1,207.20
  4. Step 4: Simplify right side
    4,128.60x = 7,475,851.58
  5. Step 5: Solve for x
    x = 7,475,851.58/4,128.60
  6. Step 6: Final answer
    x = 1,810.75

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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.