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Finding the Fourth Proportional to 472,927.20, 709,909.20 and 262,456.80

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Solution

The fourth proportional to 472,927.20, 709,909.20 and 262,456.80 is: 393,972.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,927.20 : 709,909.20 = 262,456.80 : x
  2. Step 2: Convert to fraction form
    472,927.20/709,909.20 = 262,456.80/x
  3. Step 3: Cross multiply
    472,927.20x = 709,909.20 × 262,456.80
  4. Step 4: Simplify right side
    472,927.20x = 186,320,496,922.56
  5. Step 5: Solve for x
    x = 186,320,496,922.56/472,927.20
  6. Step 6: Final answer
    x = 393,972.89

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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.