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Finding the Fourth Proportional to 630,129.60, 945,885.60 and 393,739.20

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Solution

The fourth proportional to 630,129.60, 945,885.60 and 393,739.20 is: 591,040.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,129.60 : 945,885.60 = 393,739.20 : x
  2. Step 2: Convert to fraction form
    630,129.60/945,885.60 = 393,739.20/x
  3. Step 3: Cross multiply
    630,129.60x = 945,885.60 × 393,739.20
  4. Step 4: Simplify right side
    630,129.60x = 372,432,239,435.52
  5. Step 5: Solve for x
    x = 372,432,239,435.52/630,129.60
  6. Step 6: Final answer
    x = 591,040.70

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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.