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Finding the Fourth Proportional to 630,440.72, 945,179.64 and 315,123.92

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Solution

The fourth proportional to 630,440.72, 945,179.64 and 315,123.92 is: 472,445.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,440.72 : 945,179.64 = 315,123.92 : x
  2. Step 2: Convert to fraction form
    630,440.72/945,179.64 = 315,123.92/x
  3. Step 3: Cross multiply
    630,440.72x = 945,179.64 × 315,123.92
  4. Step 4: Simplify right side
    630,440.72x = 297,848,713,260.99
  5. Step 5: Solve for x
    x = 297,848,713,260.99/630,440.72
  6. Step 6: Final answer
    x = 472,445.23

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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.