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Finding the Fourth Proportional to 564.36, 846.54 and 390.48

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Solution

The fourth proportional to 564.36, 846.54 and 390.48 is: 585.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.36 : 846.54 = 390.48 : x
  2. Step 2: Convert to fraction form
    564.36/846.54 = 390.48/x
  3. Step 3: Cross multiply
    564.36x = 846.54 × 390.48
  4. Step 4: Simplify right side
    564.36x = 330,556.94
  5. Step 5: Solve for x
    x = 330,556.94/564.36
  6. Step 6: Final answer
    x = 585.72

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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.