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Finding the Fourth Proportional to 954.06, 1,316.46 and 638.82

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Solution

The fourth proportional to 954.06, 1,316.46 and 638.82 is: 881.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.06 : 1,316.46 = 638.82 : x
  2. Step 2: Convert to fraction form
    954.06/1,316.46 = 638.82/x
  3. Step 3: Cross multiply
    954.06x = 1,316.46 × 638.82
  4. Step 4: Simplify right side
    954.06x = 840,980.98
  5. Step 5: Solve for x
    x = 840,980.98/954.06
  6. Step 6: Final answer
    x = 881.48

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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.