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Finding the Fourth Proportional to 954.72, 1,317.16 and 556.20

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Solution

The fourth proportional to 954.72, 1,317.16 and 556.20 is: 767.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.72 : 1,317.16 = 556.20 : x
  2. Step 2: Convert to fraction form
    954.72/1,317.16 = 556.20/x
  3. Step 3: Cross multiply
    954.72x = 1,317.16 × 556.20
  4. Step 4: Simplify right side
    954.72x = 732,604.39
  5. Step 5: Solve for x
    x = 732,604.39/954.72
  6. Step 6: Final answer
    x = 767.35

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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.