Home / 1,425.03-2,139.51-985.19

Finding the Fourth Proportional to 1,425.03, 2,139.51 and 985.19

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Solution

The fourth proportional to 1,425.03, 2,139.51 and 985.19 is: 1,479.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.03 : 2,139.51 = 985.19 : x
  2. Step 2: Convert to fraction form
    1,425.03/2,139.51 = 985.19/x
  3. Step 3: Cross multiply
    1,425.03x = 2,139.51 × 985.19
  4. Step 4: Simplify right side
    1,425.03x = 2,107,823.86
  5. Step 5: Solve for x
    x = 2,107,823.86/1,425.03
  6. Step 6: Final answer
    x = 1,479.14

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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.