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Finding the Fourth Proportional to 663,649.80, 915,837.64 and 361,843.80

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Solution

The fourth proportional to 663,649.80, 915,837.64 and 361,843.80 is: 499,344.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,649.80 : 915,837.64 = 361,843.80 : x
  2. Step 2: Convert to fraction form
    663,649.80/915,837.64 = 361,843.80/x
  3. Step 3: Cross multiply
    663,649.80x = 915,837.64 × 361,843.80
  4. Step 4: Simplify right side
    663,649.80x = 331,390,171,840.63
  5. Step 5: Solve for x
    x = 331,390,171,840.63/663,649.80
  6. Step 6: Final answer
    x = 499,344.94

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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.