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Finding the Third Proportional to 390,930.05 and 624,333.45

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Solution

The third proportional to 390,930.05 and 624,333.45 is: 997,089.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,930.05 : 624,333.45 = 624,333.45 : x
  2. Step 2: Convert to fraction form
    390,930.05/624,333.45 = 624,333.45/x
  3. Step 3: Cross multiply
    390,930.05x = 624,333.45 × 624,333.45
  4. Step 4: Simplify right side
    390,930.05x = 389,792,250,935.78
  5. Step 5: Solve for x
    x = 389,792,250,935.78/390,930.05
  6. Step 6: Final answer
    x = 997,089.52

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.