Home / 1,513.08-2,268.30-782.28

Finding the Fourth Proportional to 1,513.08, 2,268.30 and 782.28

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Solution

The fourth proportional to 1,513.08, 2,268.30 and 782.28 is: 1,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.08 : 2,268.30 = 782.28 : x
  2. Step 2: Convert to fraction form
    1,513.08/2,268.30 = 782.28/x
  3. Step 3: Cross multiply
    1,513.08x = 2,268.30 × 782.28
  4. Step 4: Simplify right side
    1,513.08x = 1,774,445.72
  5. Step 5: Solve for x
    x = 1,774,445.72/1,513.08
  6. Step 6: Final answer
    x = 1,172.74

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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.