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Finding the Fourth Proportional to 663,884.49, 916,156.41 and 377,404.59

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Solution

The fourth proportional to 663,884.49, 916,156.41 and 377,404.59 is: 520,815.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,884.49 : 916,156.41 = 377,404.59 : x
  2. Step 2: Convert to fraction form
    663,884.49/916,156.41 = 377,404.59/x
  3. Step 3: Cross multiply
    663,884.49x = 916,156.41 × 377,404.59
  4. Step 4: Simplify right side
    663,884.49x = 345,761,634,291.92
  5. Step 5: Solve for x
    x = 345,761,634,291.92/663,884.49
  6. Step 6: Final answer
    x = 520,815.95

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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.