Home / 1,878.16-2,817.64-579.72

Finding the Fourth Proportional to 1,878.16, 2,817.64 and 579.72

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Solution

The fourth proportional to 1,878.16, 2,817.64 and 579.72 is: 869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.16 : 2,817.64 = 579.72 : x
  2. Step 2: Convert to fraction form
    1,878.16/2,817.64 = 579.72/x
  3. Step 3: Cross multiply
    1,878.16x = 2,817.64 × 579.72
  4. Step 4: Simplify right side
    1,878.16x = 1,633,442.26
  5. Step 5: Solve for x
    x = 1,633,442.26/1,878.16
  6. Step 6: Final answer
    x = 869.70

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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.