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Finding the Fourth Proportional to 563,471.75, 777,589.53 and 305,355.89

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Solution

The fourth proportional to 563,471.75, 777,589.53 and 305,355.89 is: 421,390.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,471.75 : 777,589.53 = 305,355.89 : x
  2. Step 2: Convert to fraction form
    563,471.75/777,589.53 = 305,355.89/x
  3. Step 3: Cross multiply
    563,471.75x = 777,589.53 × 305,355.89
  4. Step 4: Simplify right side
    563,471.75x = 237,441,543,786.72
  5. Step 5: Solve for x
    x = 237,441,543,786.72/563,471.75
  6. Step 6: Final answer
    x = 421,390.32

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1.5x scale

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.