Home / 1,988.42-2,979.39-1,575.32

Finding the Fourth Proportional to 1,988.42, 2,979.39 and 1,575.32

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Solution

The fourth proportional to 1,988.42, 2,979.39 and 1,575.32 is: 2,360.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.42 : 2,979.39 = 1,575.32 : x
  2. Step 2: Convert to fraction form
    1,988.42/2,979.39 = 1,575.32/x
  3. Step 3: Cross multiply
    1,988.42x = 2,979.39 × 1,575.32
  4. Step 4: Simplify right side
    1,988.42x = 4,693,492.65
  5. Step 5: Solve for x
    x = 4,693,492.65/1,988.42
  6. Step 6: Final answer
    x = 2,360.41

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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.