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Finding the Fourth Proportional to 663,322, 915,409.08 and 376,890.60

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Solution

The fourth proportional to 663,322, 915,409.08 and 376,890.60 is: 520,123.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,322 : 915,409.08 = 376,890.60 : x
  2. Step 2: Convert to fraction form
    663,322/915,409.08 = 376,890.60/x
  3. Step 3: Cross multiply
    663,322x = 915,409.08 × 376,890.60
  4. Step 4: Simplify right side
    663,322x = 345,009,077,406.65
  5. Step 5: Solve for x
    x = 345,009,077,406.65/663,322
  6. Step 6: Final answer
    x = 520,123.07

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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.