Home / 1,990.96-2,748.66-1,547.88

Finding the Fourth Proportional to 1,990.96, 2,748.66 and 1,547.88

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Solution

The fourth proportional to 1,990.96, 2,748.66 and 1,547.88 is: 2,136.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.96 : 2,748.66 = 1,547.88 : x
  2. Step 2: Convert to fraction form
    1,990.96/2,748.66 = 1,547.88/x
  3. Step 3: Cross multiply
    1,990.96x = 2,748.66 × 1,547.88
  4. Step 4: Simplify right side
    1,990.96x = 4,254,595.84
  5. Step 5: Solve for x
    x = 4,254,595.84/1,990.96
  6. Step 6: Final answer
    x = 2,136.96

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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.