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Finding the Fourth Proportional to 469.72, 647.53 and 292.56

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Solution

The fourth proportional to 469.72, 647.53 and 292.56 is: 403.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.72 : 647.53 = 292.56 : x
  2. Step 2: Convert to fraction form
    469.72/647.53 = 292.56/x
  3. Step 3: Cross multiply
    469.72x = 647.53 × 292.56
  4. Step 4: Simplify right side
    469.72x = 189,441.38
  5. Step 5: Solve for x
    x = 189,441.38/469.72
  6. Step 6: Final answer
    x = 403.31

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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.