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Finding the Fourth Proportional to 519,895.20, 779,842.80 and 317,816.40

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Solution

The fourth proportional to 519,895.20, 779,842.80 and 317,816.40 is: 476,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,895.20 : 779,842.80 = 317,816.40 : x
  2. Step 2: Convert to fraction form
    519,895.20/779,842.80 = 317,816.40/x
  3. Step 3: Cross multiply
    519,895.20x = 779,842.80 × 317,816.40
  4. Step 4: Simplify right side
    519,895.20x = 247,846,831,261.92
  5. Step 5: Solve for x
    x = 247,846,831,261.92/519,895.20
  6. Step 6: Final answer
    x = 476,724.60

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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.