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Finding the Fourth Proportional to 565,857.39, 780,870.37 and 311,212.83

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Solution

The fourth proportional to 565,857.39, 780,870.37 and 311,212.83 is: 429,466.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,857.39 : 780,870.37 = 311,212.83 : x
  2. Step 2: Convert to fraction form
    565,857.39/780,870.37 = 311,212.83/x
  3. Step 3: Cross multiply
    565,857.39x = 780,870.37 × 311,212.83
  4. Step 4: Simplify right side
    565,857.39x = 243,016,877,710.85
  5. Step 5: Solve for x
    x = 243,016,877,710.85/565,857.39
  6. Step 6: Final answer
    x = 429,466.65

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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.