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Finding the Fourth Proportional to 565,805.58, 780,796.13 and 311,156.78

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Solution

The fourth proportional to 565,805.58, 780,796.13 and 311,156.78 is: 429,387.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,805.58 : 780,796.13 = 311,156.78 : x
  2. Step 2: Convert to fraction form
    565,805.58/780,796.13 = 311,156.78/x
  3. Step 3: Cross multiply
    565,805.58x = 780,796.13 × 311,156.78
  4. Step 4: Simplify right side
    565,805.58x = 242,950,004,187.50
  5. Step 5: Solve for x
    x = 242,950,004,187.50/565,805.58
  6. Step 6: Final answer
    x = 429,387.78

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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.