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Finding the Fourth Proportional to 490,409.30, 676,784.76 and 275,548.70

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Solution

The fourth proportional to 490,409.30, 676,784.76 and 275,548.70 is: 380,268.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,409.30 : 676,784.76 = 275,548.70 : x
  2. Step 2: Convert to fraction form
    490,409.30/676,784.76 = 275,548.70/x
  3. Step 3: Cross multiply
    490,409.30x = 676,784.76 × 275,548.70
  4. Step 4: Simplify right side
    490,409.30x = 186,487,160,797.81
  5. Step 5: Solve for x
    x = 186,487,160,797.81/490,409.30
  6. Step 6: Final answer
    x = 380,268.40

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Double scale
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Similar ratio
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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.