Home / 1,407.12-1,944.40-1,339.68

Finding the Fourth Proportional to 1,407.12, 1,944.40 and 1,339.68

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Solution

The fourth proportional to 1,407.12, 1,944.40 and 1,339.68 is: 1,851.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.12 : 1,944.40 = 1,339.68 : x
  2. Step 2: Convert to fraction form
    1,407.12/1,944.40 = 1,339.68/x
  3. Step 3: Cross multiply
    1,407.12x = 1,944.40 × 1,339.68
  4. Step 4: Simplify right side
    1,407.12x = 2,604,873.79
  5. Step 5: Solve for x
    x = 2,604,873.79/1,407.12
  6. Step 6: Final answer
    x = 1,851.21

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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.