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Finding the Fourth Proportional to 565.79, 848.68 and 257.65

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Solution

The fourth proportional to 565.79, 848.68 and 257.65 is: 386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.79 : 848.68 = 257.65 : x
  2. Step 2: Convert to fraction form
    565.79/848.68 = 257.65/x
  3. Step 3: Cross multiply
    565.79x = 848.68 × 257.65
  4. Step 4: Simplify right side
    565.79x = 218,659.64
  5. Step 5: Solve for x
    x = 218,659.64/565.79
  6. Step 6: Final answer
    x = 386.47

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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.