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Finding the Fourth Proportional to 954.10, 1,427.15 and 857.30

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Solution

The fourth proportional to 954.10, 1,427.15 and 857.30 is: 1,282.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.10 : 1,427.15 = 857.30 : x
  2. Step 2: Convert to fraction form
    954.10/1,427.15 = 857.30/x
  3. Step 3: Cross multiply
    954.10x = 1,427.15 × 857.30
  4. Step 4: Simplify right side
    954.10x = 1,223,495.70
  5. Step 5: Solve for x
    x = 1,223,495.70/954.10
  6. Step 6: Final answer
    x = 1,282.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.