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Finding the Fourth Proportional to 663,860.85, 916,123.77 and 377,380.92

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Solution

The fourth proportional to 663,860.85, 916,123.77 and 377,380.92 is: 520,783.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,860.85 : 916,123.77 = 377,380.92 : x
  2. Step 2: Convert to fraction form
    663,860.85/916,123.77 = 377,380.92/x
  3. Step 3: Cross multiply
    663,860.85x = 916,123.77 × 377,380.92
  4. Step 4: Simplify right side
    663,860.85x = 345,727,631,156.47
  5. Step 5: Solve for x
    x = 345,727,631,156.47/663,860.85
  6. Step 6: Final answer
    x = 520,783.28

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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.