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Finding the Fourth Proportional to 469.26, 647.58 and 256.57

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Solution

The fourth proportional to 469.26, 647.58 and 256.57 is: 354.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.26 : 647.58 = 256.57 : x
  2. Step 2: Convert to fraction form
    469.26/647.58 = 256.57/x
  3. Step 3: Cross multiply
    469.26x = 647.58 × 256.57
  4. Step 4: Simplify right side
    469.26x = 166,149.45
  5. Step 5: Solve for x
    x = 166,149.45/469.26
  6. Step 6: Final answer
    x = 354.07

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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.