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Finding the Fourth Proportional to 919.12, 1,268.30 and 546.19

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Solution

The fourth proportional to 919.12, 1,268.30 and 546.19 is: 753.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.12 : 1,268.30 = 546.19 : x
  2. Step 2: Convert to fraction form
    919.12/1,268.30 = 546.19/x
  3. Step 3: Cross multiply
    919.12x = 1,268.30 × 546.19
  4. Step 4: Simplify right side
    919.12x = 692,730.97
  5. Step 5: Solve for x
    x = 692,730.97/919.12
  6. Step 6: Final answer
    x = 753.69

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Double scale
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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.