Home / 1,284.31-1,917.10-1,102.87

Finding the Fourth Proportional to 1,284.31, 1,917.10 and 1,102.87

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Solution

The fourth proportional to 1,284.31, 1,917.10 and 1,102.87 is: 1,646.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.31 : 1,917.10 = 1,102.87 : x
  2. Step 2: Convert to fraction form
    1,284.31/1,917.10 = 1,102.87/x
  3. Step 3: Cross multiply
    1,284.31x = 1,917.10 × 1,102.87
  4. Step 4: Simplify right side
    1,284.31x = 2,114,312.08
  5. Step 5: Solve for x
    x = 2,114,312.08/1,284.31
  6. Step 6: Final answer
    x = 1,646.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.