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Finding the Fourth Proportional to 630,147.10, 945,911.85 and 393,756.70

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Solution

The fourth proportional to 630,147.10, 945,911.85 and 393,756.70 is: 591,066.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,147.10 : 945,911.85 = 393,756.70 : x
  2. Step 2: Convert to fraction form
    630,147.10/945,911.85 = 393,756.70/x
  3. Step 3: Cross multiply
    630,147.10x = 945,911.85 × 393,756.70
  4. Step 4: Simplify right side
    630,147.10x = 372,459,128,546.90
  5. Step 5: Solve for x
    x = 372,459,128,546.90/630,147.10
  6. Step 6: Final answer
    x = 591,066.96

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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.