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Finding the Fourth Proportional to 954.93, 1,318.35 and 641.24

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Solution

The fourth proportional to 954.93, 1,318.35 and 641.24 is: 885.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.93 : 1,318.35 = 641.24 : x
  2. Step 2: Convert to fraction form
    954.93/1,318.35 = 641.24/x
  3. Step 3: Cross multiply
    954.93x = 1,318.35 × 641.24
  4. Step 4: Simplify right side
    954.93x = 845,373.07
  5. Step 5: Solve for x
    x = 845,373.07/954.93
  6. Step 6: Final answer
    x = 885.27

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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.