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Finding the Fourth Proportional to 435.52, 648.71 and 434.68

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Solution

The fourth proportional to 435.52, 648.71 and 434.68 is: 647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.52 : 648.71 = 434.68 : x
  2. Step 2: Convert to fraction form
    435.52/648.71 = 434.68/x
  3. Step 3: Cross multiply
    435.52x = 648.71 × 434.68
  4. Step 4: Simplify right side
    435.52x = 281,981.26
  5. Step 5: Solve for x
    x = 281,981.26/435.52
  6. Step 6: Final answer
    x = 647.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.