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Finding the Fourth Proportional to 663,410.19, 915,506.34 and 376,930.65

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Solution

The fourth proportional to 663,410.19, 915,506.34 and 376,930.65 is: 520,164.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,410.19 : 915,506.34 = 376,930.65 : x
  2. Step 2: Convert to fraction form
    663,410.19/915,506.34 = 376,930.65/x
  3. Step 3: Cross multiply
    663,410.19x = 915,506.34 × 376,930.65
  4. Step 4: Simplify right side
    663,410.19x = 345,082,399,815.32
  5. Step 5: Solve for x
    x = 345,082,399,815.32/663,410.19
  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.