Home / 2,987.10-4,479.45-1,038.30

Finding the Fourth Proportional to 2,987.10, 4,479.45 and 1,038.30

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Solution

The fourth proportional to 2,987.10, 4,479.45 and 1,038.30 is: 1,557.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.10 : 4,479.45 = 1,038.30 : x
  2. Step 2: Convert to fraction form
    2,987.10/4,479.45 = 1,038.30/x
  3. Step 3: Cross multiply
    2,987.10x = 4,479.45 × 1,038.30
  4. Step 4: Simplify right side
    2,987.10x = 4,651,012.94
  5. Step 5: Solve for x
    x = 4,651,012.94/2,987.10
  6. Step 6: Final answer
    x = 1,557.03

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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.