Home / 1,116.55-1,540.35-785.19

Finding the Fourth Proportional to 1,116.55, 1,540.35 and 785.19

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Solution

The fourth proportional to 1,116.55, 1,540.35 and 785.19 is: 1,083.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.55 : 1,540.35 = 785.19 : x
  2. Step 2: Convert to fraction form
    1,116.55/1,540.35 = 785.19/x
  3. Step 3: Cross multiply
    1,116.55x = 1,540.35 × 785.19
  4. Step 4: Simplify right side
    1,116.55x = 1,209,455.79
  5. Step 5: Solve for x
    x = 1,209,455.79/1,116.55
  6. Step 6: Final answer
    x = 1,083.21

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1.5x scale

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.