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Finding the Fourth Proportional to 570.93, 856.29 and 405.87

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Solution

The fourth proportional to 570.93, 856.29 and 405.87 is: 608.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.93 : 856.29 = 405.87 : x
  2. Step 2: Convert to fraction form
    570.93/856.29 = 405.87/x
  3. Step 3: Cross multiply
    570.93x = 856.29 × 405.87
  4. Step 4: Simplify right side
    570.93x = 347,542.42
  5. Step 5: Solve for x
    x = 347,542.42/570.93
  6. Step 6: Final answer
    x = 608.73

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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.