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Finding the Fourth Proportional to 630,146.60, 945,911.10 and 393,756.20

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Solution

The fourth proportional to 630,146.60, 945,911.10 and 393,756.20 is: 591,066.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,146.60 : 945,911.10 = 393,756.20 : x
  2. Step 2: Convert to fraction form
    630,146.60/945,911.10 = 393,756.20/x
  3. Step 3: Cross multiply
    630,146.60x = 945,911.10 × 393,756.20
  4. Step 4: Simplify right side
    630,146.60x = 372,458,360,273.82
  5. Step 5: Solve for x
    x = 372,458,360,273.82/630,146.60
  6. Step 6: Final answer
    x = 591,066.21

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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.