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Finding the Fourth Proportional to 565,818.51, 780,813.98 and 311,169.70

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Solution

The fourth proportional to 565,818.51, 780,813.98 and 311,169.70 is: 429,405.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,818.51 : 780,813.98 = 311,169.70 : x
  2. Step 2: Convert to fraction form
    565,818.51/780,813.98 = 311,169.70/x
  3. Step 3: Cross multiply
    565,818.51x = 780,813.98 × 311,169.70
  4. Step 4: Simplify right side
    565,818.51x = 242,965,652,499.46
  5. Step 5: Solve for x
    x = 242,965,652,499.46/565,818.51
  6. Step 6: Final answer
    x = 429,405.62

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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.