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Finding the Fourth Proportional to 420,015.20, 630,027.60 and 104,472.80

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Solution

The fourth proportional to 420,015.20, 630,027.60 and 104,472.80 is: 156,710.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,015.20 : 630,027.60 = 104,472.80 : x
  2. Step 2: Convert to fraction form
    420,015.20/630,027.60 = 104,472.80/x
  3. Step 3: Cross multiply
    420,015.20x = 630,027.60 × 104,472.80
  4. Step 4: Simplify right side
    420,015.20x = 65,820,747,449.28
  5. Step 5: Solve for x
    x = 65,820,747,449.28/420,015.20
  6. Step 6: Final answer
    x = 156,710.39

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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.