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Finding the Fourth Proportional to 648.26, 971.49 and 340.10

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Solution

The fourth proportional to 648.26, 971.49 and 340.10 is: 509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.26 : 971.49 = 340.10 : x
  2. Step 2: Convert to fraction form
    648.26/971.49 = 340.10/x
  3. Step 3: Cross multiply
    648.26x = 971.49 × 340.10
  4. Step 4: Simplify right side
    648.26x = 330,403.75
  5. Step 5: Solve for x
    x = 330,403.75/648.26
  6. Step 6: Final answer
    x = 509.68

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Double scale
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1.5x scale

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.