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Finding the Fourth Proportional to 663,322.08, 915,382.80 and 361,515.36

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Solution

The fourth proportional to 663,322.08, 915,382.80 and 361,515.36 is: 498,890.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,322.08 : 915,382.80 = 361,515.36 : x
  2. Step 2: Convert to fraction form
    663,322.08/915,382.80 = 361,515.36/x
  3. Step 3: Cross multiply
    663,322.08x = 915,382.80 × 361,515.36
  4. Step 4: Simplify right side
    663,322.08x = 330,924,942,479.81
  5. Step 5: Solve for x
    x = 330,924,942,479.81/663,322.08
  6. Step 6: Final answer
    x = 498,890.29

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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.