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Finding the Fourth Proportional to 570,695.67, 855,310.86 and 215,286.30

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Solution

The fourth proportional to 570,695.67, 855,310.86 and 215,286.30 is: 322,653.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,695.67 : 855,310.86 = 215,286.30 : x
  2. Step 2: Convert to fraction form
    570,695.67/855,310.86 = 215,286.30/x
  3. Step 3: Cross multiply
    570,695.67x = 855,310.86 × 215,286.30
  4. Step 4: Simplify right side
    570,695.67x = 184,136,710,399.22
  5. Step 5: Solve for x
    x = 184,136,710,399.22/570,695.67
  6. Step 6: Final answer
    x = 322,653.07

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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.