Home / 1,575.13-2,173.64-985.99

Finding the Fourth Proportional to 1,575.13, 2,173.64 and 985.99

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Solution

The fourth proportional to 1,575.13, 2,173.64 and 985.99 is: 1,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.13 : 2,173.64 = 985.99 : x
  2. Step 2: Convert to fraction form
    1,575.13/2,173.64 = 985.99/x
  3. Step 3: Cross multiply
    1,575.13x = 2,173.64 × 985.99
  4. Step 4: Simplify right side
    1,575.13x = 2,143,184.33
  5. Step 5: Solve for x
    x = 2,143,184.33/1,575.13
  6. Step 6: Final answer
    x = 1,360.64

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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.