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Finding the Fourth Proportional to 565.56, 848.40 and 257.43

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Solution

The fourth proportional to 565.56, 848.40 and 257.43 is: 386.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.56 : 848.40 = 257.43 : x
  2. Step 2: Convert to fraction form
    565.56/848.40 = 257.43/x
  3. Step 3: Cross multiply
    565.56x = 848.40 × 257.43
  4. Step 4: Simplify right side
    565.56x = 218,403.61
  5. Step 5: Solve for x
    x = 218,403.61/565.56
  6. Step 6: Final answer
    x = 386.17

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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.