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Finding the Fourth Proportional to 954.30, 1,429.22 and 928.02

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Solution

The fourth proportional to 954.30, 1,429.22 and 928.02 is: 1,389.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.30 : 1,429.22 = 928.02 : x
  2. Step 2: Convert to fraction form
    954.30/1,429.22 = 928.02/x
  3. Step 3: Cross multiply
    954.30x = 1,429.22 × 928.02
  4. Step 4: Simplify right side
    954.30x = 1,326,344.74
  5. Step 5: Solve for x
    x = 1,326,344.74/954.30
  6. Step 6: Final answer
    x = 1,389.86

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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.