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Finding the Fourth Proportional to 645.59, 893.27 and 562.87

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Solution

The fourth proportional to 645.59, 893.27 and 562.87 is: 778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.59 : 893.27 = 562.87 : x
  2. Step 2: Convert to fraction form
    645.59/893.27 = 562.87/x
  3. Step 3: Cross multiply
    645.59x = 893.27 × 562.87
  4. Step 4: Simplify right side
    645.59x = 502,794.30
  5. Step 5: Solve for x
    x = 502,794.30/645.59
  6. Step 6: Final answer
    x = 778.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.