Home / 1,390.24-2,070.84-1,327.06

Finding the Fourth Proportional to 1,390.24, 2,070.84 and 1,327.06

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Solution

The fourth proportional to 1,390.24, 2,070.84 and 1,327.06 is: 1,976.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.24 : 2,070.84 = 1,327.06 : x
  2. Step 2: Convert to fraction form
    1,390.24/2,070.84 = 1,327.06/x
  3. Step 3: Cross multiply
    1,390.24x = 2,070.84 × 1,327.06
  4. Step 4: Simplify right side
    1,390.24x = 2,748,128.93
  5. Step 5: Solve for x
    x = 2,748,128.93/1,390.24
  6. Step 6: Final answer
    x = 1,976.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.