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Finding the Fourth Proportional to 955.48, 1,317.70 and 656.58

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Solution

The fourth proportional to 955.48, 1,317.70 and 656.58 is: 905.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.48 : 1,317.70 = 656.58 : x
  2. Step 2: Convert to fraction form
    955.48/1,317.70 = 656.58/x
  3. Step 3: Cross multiply
    955.48x = 1,317.70 × 656.58
  4. Step 4: Simplify right side
    955.48x = 865,175.47
  5. Step 5: Solve for x
    x = 865,175.47/955.48
  6. Step 6: Final answer
    x = 905.49

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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.