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Finding the Fourth Proportional to 630,439.80, 945,746.10 and 209,671.80

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Solution

The fourth proportional to 630,439.80, 945,746.10 and 209,671.80 is: 314,536.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,439.80 : 945,746.10 = 209,671.80 : x
  2. Step 2: Convert to fraction form
    630,439.80/945,746.10 = 209,671.80/x
  3. Step 3: Cross multiply
    630,439.80x = 945,746.10 × 209,671.80
  4. Step 4: Simplify right side
    630,439.80x = 198,296,287,129.98
  5. Step 5: Solve for x
    x = 198,296,287,129.98/630,439.80
  6. Step 6: Final answer
    x = 314,536.43

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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.