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Finding the Fourth Proportional to 470.23, 648.90 and 260.40

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Solution

The fourth proportional to 470.23, 648.90 and 260.40 is: 359.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.23 : 648.90 = 260.40 : x
  2. Step 2: Convert to fraction form
    470.23/648.90 = 260.40/x
  3. Step 3: Cross multiply
    470.23x = 648.90 × 260.40
  4. Step 4: Simplify right side
    470.23x = 168,973.56
  5. Step 5: Solve for x
    x = 168,973.56/470.23
  6. Step 6: Final answer
    x = 359.34

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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.