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Finding the Fourth Proportional to 564.47, 843.93 and 478.77

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Solution

The fourth proportional to 564.47, 843.93 and 478.77 is: 715.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.47 : 843.93 = 478.77 : x
  2. Step 2: Convert to fraction form
    564.47/843.93 = 478.77/x
  3. Step 3: Cross multiply
    564.47x = 843.93 × 478.77
  4. Step 4: Simplify right side
    564.47x = 404,048.37
  5. Step 5: Solve for x
    x = 404,048.37/564.47
  6. Step 6: Final answer
    x = 715.80

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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.