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Finding the Fourth Proportional to 630,003.40, 945,005.10 and 405,617.20

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Solution

The fourth proportional to 630,003.40, 945,005.10 and 405,617.20 is: 608,425.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,003.40 : 945,005.10 = 405,617.20 : x
  2. Step 2: Convert to fraction form
    630,003.40/945,005.10 = 405,617.20/x
  3. Step 3: Cross multiply
    630,003.40x = 945,005.10 × 405,617.20
  4. Step 4: Simplify right side
    630,003.40x = 383,310,322,647.72
  5. Step 5: Solve for x
    x = 383,310,322,647.72/630,003.40
  6. Step 6: Final answer
    x = 608,425.80

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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.