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Finding the Fourth Proportional to 663,528.20, 915,653.94 and 408,870.92

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Solution

The fourth proportional to 663,528.20, 915,653.94 and 408,870.92 is: 564,232.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,528.20 : 915,653.94 = 408,870.92 : x
  2. Step 2: Convert to fraction form
    663,528.20/915,653.94 = 408,870.92/x
  3. Step 3: Cross multiply
    663,528.20x = 915,653.94 × 408,870.92
  4. Step 4: Simplify right side
    663,528.20x = 374,384,268,849.43
  5. Step 5: Solve for x
    x = 374,384,268,849.43/663,528.20
  6. Step 6: Final answer
    x = 564,232.64

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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.