Home / 2,987.07-4,122.55-1,807.91

Finding the Fourth Proportional to 2,987.07, 4,122.55 and 1,807.91

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Solution

The fourth proportional to 2,987.07, 4,122.55 and 1,807.91 is: 2,495.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.07 : 4,122.55 = 1,807.91 : x
  2. Step 2: Convert to fraction form
    2,987.07/4,122.55 = 1,807.91/x
  3. Step 3: Cross multiply
    2,987.07x = 4,122.55 × 1,807.91
  4. Step 4: Simplify right side
    2,987.07x = 7,453,196.48
  5. Step 5: Solve for x
    x = 7,453,196.48/2,987.07
  6. Step 6: Final answer
    x = 2,495.16

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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.