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Finding the Fourth Proportional to 565.87, 780.89 and 313.79

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Solution

The fourth proportional to 565.87, 780.89 and 313.79 is: 433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.87 : 780.89 = 313.79 : x
  2. Step 2: Convert to fraction form
    565.87/780.89 = 313.79/x
  3. Step 3: Cross multiply
    565.87x = 780.89 × 313.79
  4. Step 4: Simplify right side
    565.87x = 245,037.98
  5. Step 5: Solve for x
    x = 245,037.98/565.87
  6. Step 6: Final answer
    x = 433.03

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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.