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Finding the Fourth Proportional to 519,253.20, 778,879.80 and 203,720.40

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Solution

The fourth proportional to 519,253.20, 778,879.80 and 203,720.40 is: 305,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,253.20 : 778,879.80 = 203,720.40 : x
  2. Step 2: Convert to fraction form
    519,253.20/778,879.80 = 203,720.40/x
  3. Step 3: Cross multiply
    519,253.20x = 778,879.80 × 203,720.40
  4. Step 4: Simplify right side
    519,253.20x = 158,673,704,407.92
  5. Step 5: Solve for x
    x = 158,673,704,407.92/519,253.20
  6. Step 6: Final answer
    x = 305,580.60

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Half scale
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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.