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Finding the Fourth Proportional to 925.51, 1,276.90 and 659.99

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Solution

The fourth proportional to 925.51, 1,276.90 and 659.99 is: 910.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.51 : 1,276.90 = 659.99 : x
  2. Step 2: Convert to fraction form
    925.51/1,276.90 = 659.99/x
  3. Step 3: Cross multiply
    925.51x = 1,276.90 × 659.99
  4. Step 4: Simplify right side
    925.51x = 842,742.77
  5. Step 5: Solve for x
    x = 842,742.77/925.51
  6. Step 6: Final answer
    x = 910.57

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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.