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Finding the Fourth Proportional to 659.95, 910.61 and 426.94

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Solution

The fourth proportional to 659.95, 910.61 and 426.94 is: 589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.95 : 910.61 = 426.94 : x
  2. Step 2: Convert to fraction form
    659.95/910.61 = 426.94/x
  3. Step 3: Cross multiply
    659.95x = 910.61 × 426.94
  4. Step 4: Simplify right side
    659.95x = 388,773.02
  5. Step 5: Solve for x
    x = 388,773.02/659.95
  6. Step 6: Final answer
    x = 589.10

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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.