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Finding the Fourth Proportional to 505,747.80, 758,621.70 and 253,805.40

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Solution

The fourth proportional to 505,747.80, 758,621.70 and 253,805.40 is: 380,708.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,747.80 : 758,621.70 = 253,805.40 : x
  2. Step 2: Convert to fraction form
    505,747.80/758,621.70 = 253,805.40/x
  3. Step 3: Cross multiply
    505,747.80x = 758,621.70 × 253,805.40
  4. Step 4: Simplify right side
    505,747.80x = 192,542,284,017.18
  5. Step 5: Solve for x
    x = 192,542,284,017.18/505,747.80
  6. Step 6: Final answer
    x = 380,708.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.