Home / 1,915.14-2,870.66-990.46

Finding the Fourth Proportional to 1,915.14, 2,870.66 and 990.46

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Solution

The fourth proportional to 1,915.14, 2,870.66 and 990.46 is: 1,484.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.14 : 2,870.66 = 990.46 : x
  2. Step 2: Convert to fraction form
    1,915.14/2,870.66 = 990.46/x
  3. Step 3: Cross multiply
    1,915.14x = 2,870.66 × 990.46
  4. Step 4: Simplify right side
    1,915.14x = 2,843,273.90
  5. Step 5: Solve for x
    x = 2,843,273.90/1,915.14
  6. Step 6: Final answer
    x = 1,484.63

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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.