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Finding the Fourth Proportional to 934.72, 1,288.56 and 654.08

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Solution

The fourth proportional to 934.72, 1,288.56 and 654.08 is: 901.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.72 : 1,288.56 = 654.08 : x
  2. Step 2: Convert to fraction form
    934.72/1,288.56 = 654.08/x
  3. Step 3: Cross multiply
    934.72x = 1,288.56 × 654.08
  4. Step 4: Simplify right side
    934.72x = 842,821.32
  5. Step 5: Solve for x
    x = 842,821.32/934.72
  6. Step 6: Final answer
    x = 901.68

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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.