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Finding the Fourth Proportional to 469.90, 648.54 and 295.12

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Solution

The fourth proportional to 469.90, 648.54 and 295.12 is: 407.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.90 : 648.54 = 295.12 : x
  2. Step 2: Convert to fraction form
    469.90/648.54 = 295.12/x
  3. Step 3: Cross multiply
    469.90x = 648.54 × 295.12
  4. Step 4: Simplify right side
    469.90x = 191,397.12
  5. Step 5: Solve for x
    x = 191,397.12/469.90
  6. Step 6: Final answer
    x = 407.31

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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.