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Finding the Fourth Proportional to 565,815.84, 780,810.28 and 311,167

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Solution

The fourth proportional to 565,815.84, 780,810.28 and 311,167 is: 429,401.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,815.84 : 780,810.28 = 311,167 : x
  2. Step 2: Convert to fraction form
    565,815.84/780,810.28 = 311,167/x
  3. Step 3: Cross multiply
    565,815.84x = 780,810.28 × 311,167
  4. Step 4: Simplify right side
    565,815.84x = 242,962,392,396.76
  5. Step 5: Solve for x
    x = 242,962,392,396.76/565,815.84
  6. Step 6: Final answer
    x = 429,401.89

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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.