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Finding the Fourth Proportional to 630,129.80, 945,281.10 and 209,361.80

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Solution

The fourth proportional to 630,129.80, 945,281.10 and 209,361.80 is: 314,071.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,129.80 : 945,281.10 = 209,361.80 : x
  2. Step 2: Convert to fraction form
    630,129.80/945,281.10 = 209,361.80/x
  3. Step 3: Cross multiply
    630,129.80x = 945,281.10 × 209,361.80
  4. Step 4: Simplify right side
    630,129.80x = 197,905,752,601.98
  5. Step 5: Solve for x
    x = 197,905,752,601.98/630,129.80
  6. Step 6: Final answer
    x = 314,071.41

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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.