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Finding the Fourth Proportional to 564.64, 846.26 and 256.40

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Solution

The fourth proportional to 564.64, 846.26 and 256.40 is: 384.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.64 : 846.26 = 256.40 : x
  2. Step 2: Convert to fraction form
    564.64/846.26 = 256.40/x
  3. Step 3: Cross multiply
    564.64x = 846.26 × 256.40
  4. Step 4: Simplify right side
    564.64x = 216,979.78
  5. Step 5: Solve for x
    x = 216,979.78/564.64
  6. Step 6: Final answer
    x = 384.28

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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.