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Finding the Fourth Proportional to 954.20, 1,316.79 and 555.95

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Solution

The fourth proportional to 954.20, 1,316.79 and 555.95 is: 767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.20 : 1,316.79 = 555.95 : x
  2. Step 2: Convert to fraction form
    954.20/1,316.79 = 555.95/x
  3. Step 3: Cross multiply
    954.20x = 1,316.79 × 555.95
  4. Step 4: Simplify right side
    954.20x = 732,072.69
  5. Step 5: Solve for x
    x = 732,072.69/954.20
  6. Step 6: Final answer
    x = 767.21

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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.