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Finding the Fourth Proportional to 630,288.50, 945,440.99 and 209,564.38

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Solution

The fourth proportional to 630,288.50, 945,440.99 and 209,564.38 is: 314,349.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,288.50 : 945,440.99 = 209,564.38 : x
  2. Step 2: Convert to fraction form
    630,288.50/945,440.99 = 209,564.38/x
  3. Step 3: Cross multiply
    630,288.50x = 945,440.99 × 209,564.38
  4. Step 4: Simplify right side
    630,288.50x = 198,130,749,120.91
  5. Step 5: Solve for x
    x = 198,130,749,120.91/630,288.50
  6. Step 6: Final answer
    x = 314,349.30

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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.