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Finding the Fourth Proportional to 906.64, 1,357.92 and 554.30

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Solution

The fourth proportional to 906.64, 1,357.92 and 554.30 is: 830.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.64 : 1,357.92 = 554.30 : x
  2. Step 2: Convert to fraction form
    906.64/1,357.92 = 554.30/x
  3. Step 3: Cross multiply
    906.64x = 1,357.92 × 554.30
  4. Step 4: Simplify right side
    906.64x = 752,695.06
  5. Step 5: Solve for x
    x = 752,695.06/906.64
  6. Step 6: Final answer
    x = 830.20

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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.