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Finding the Fourth Proportional to 663,410.20, 915,506.32 and 376,930.66

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Solution

The fourth proportional to 663,410.20, 915,506.32 and 376,930.66 is: 520,164.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,410.20 : 915,506.32 = 376,930.66 : x
  2. Step 2: Convert to fraction form
    663,410.20/915,506.32 = 376,930.66/x
  3. Step 3: Cross multiply
    663,410.20x = 915,506.32 × 376,930.66
  4. Step 4: Simplify right side
    663,410.20x = 345,082,401,431.77
  5. Step 5: Solve for x
    x = 345,082,401,431.77/663,410.20
  6. Step 6: Final answer
    x = 520,164.45

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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.