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Finding the Fourth Proportional to 679,316.70, 937,217.94 and 407,472.60

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Solution

The fourth proportional to 679,316.70, 937,217.94 and 407,472.60 is: 562,168.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,316.70 : 937,217.94 = 407,472.60 : x
  2. Step 2: Convert to fraction form
    679,316.70/937,217.94 = 407,472.60/x
  3. Step 3: Cross multiply
    679,316.70x = 937,217.94 × 407,472.60
  4. Step 4: Simplify right side
    679,316.70x = 381,890,630,778.44
  5. Step 5: Solve for x
    x = 381,890,630,778.44/679,316.70
  6. Step 6: Final answer
    x = 562,168.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.