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Finding the Fourth Proportional to 663,309.38, 915,367.84 and 361,503.38

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Solution

The fourth proportional to 663,309.38, 915,367.84 and 361,503.38 is: 498,875.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,309.38 : 915,367.84 = 361,503.38 : x
  2. Step 2: Convert to fraction form
    663,309.38/915,367.84 = 361,503.38/x
  3. Step 3: Cross multiply
    663,309.38x = 915,367.84 × 361,503.38
  4. Step 4: Simplify right side
    663,309.38x = 330,908,568,103.30
  5. Step 5: Solve for x
    x = 330,908,568,103.30/663,309.38
  6. Step 6: Final answer
    x = 498,875.15

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1.5x scale

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.