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Finding the Fourth Proportional to 420,010.60, 630,015.90 and 354,400.60

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Solution

The fourth proportional to 420,010.60, 630,015.90 and 354,400.60 is: 531,600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,010.60 : 630,015.90 = 354,400.60 : x
  2. Step 2: Convert to fraction form
    420,010.60/630,015.90 = 354,400.60/x
  3. Step 3: Cross multiply
    420,010.60x = 630,015.90 × 354,400.60
  4. Step 4: Simplify right side
    420,010.60x = 223,278,012,969.54
  5. Step 5: Solve for x
    x = 223,278,012,969.54/420,010.60
  6. Step 6: Final answer
    x = 531,600.90

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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.