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Finding the Fourth Proportional to 505,813.20, 758,719.80 and 346,380.90

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Solution

The fourth proportional to 505,813.20, 758,719.80 and 346,380.90 is: 519,571.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,813.20 : 758,719.80 = 346,380.90 : x
  2. Step 2: Convert to fraction form
    505,813.20/758,719.80 = 346,380.90/x
  3. Step 3: Cross multiply
    505,813.20x = 758,719.80 × 346,380.90
  4. Step 4: Simplify right side
    505,813.20x = 262,806,047,171.82
  5. Step 5: Solve for x
    x = 262,806,047,171.82/505,813.20
  6. Step 6: Final answer
    x = 519,571.35

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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.