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Finding the Fourth Proportional to 570.86, 856.33 and 258.70

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Solution

The fourth proportional to 570.86, 856.33 and 258.70 is: 388.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.86 : 856.33 = 258.70 : x
  2. Step 2: Convert to fraction form
    570.86/856.33 = 258.70/x
  3. Step 3: Cross multiply
    570.86x = 856.33 × 258.70
  4. Step 4: Simplify right side
    570.86x = 221,528.29
  5. Step 5: Solve for x
    x = 221,528.29/570.86
  6. Step 6: Final answer
    x = 388.06

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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.