Home / 3,980.32-5,970.54-1,207.12

Finding the Fourth Proportional to 3,980.32, 5,970.54 and 1,207.12

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Solution

The fourth proportional to 3,980.32, 5,970.54 and 1,207.12 is: 1,810.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.32 : 5,970.54 = 1,207.12 : x
  2. Step 2: Convert to fraction form
    3,980.32/5,970.54 = 1,207.12/x
  3. Step 3: Cross multiply
    3,980.32x = 5,970.54 × 1,207.12
  4. Step 4: Simplify right side
    3,980.32x = 7,207,158.24
  5. Step 5: Solve for x
    x = 7,207,158.24/3,980.32
  6. Step 6: Final answer
    x = 1,810.70

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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.