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Finding the Fourth Proportional to 909.29, 1,364.27 and 519.05

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Solution

The fourth proportional to 909.29, 1,364.27 and 519.05 is: 778.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.29 : 1,364.27 = 519.05 : x
  2. Step 2: Convert to fraction form
    909.29/1,364.27 = 519.05/x
  3. Step 3: Cross multiply
    909.29x = 1,364.27 × 519.05
  4. Step 4: Simplify right side
    909.29x = 708,124.34
  5. Step 5: Solve for x
    x = 708,124.34/909.29
  6. Step 6: Final answer
    x = 778.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.