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Finding the Fourth Proportional to 630,145.60, 945,909.60 and 393,755.20

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Solution

The fourth proportional to 630,145.60, 945,909.60 and 393,755.20 is: 591,064.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,145.60 : 945,909.60 = 393,755.20 : x
  2. Step 2: Convert to fraction form
    630,145.60/945,909.60 = 393,755.20/x
  3. Step 3: Cross multiply
    630,145.60x = 945,909.60 × 393,755.20
  4. Step 4: Simplify right side
    630,145.60x = 372,456,823,729.92
  5. Step 5: Solve for x
    x = 372,456,823,729.92/630,145.60
  6. Step 6: Final answer
    x = 591,064.71

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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.