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Finding the Fourth Proportional to 659.54, 910.29 and 394.01

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Solution

The fourth proportional to 659.54, 910.29 and 394.01 is: 543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.54 : 910.29 = 394.01 : x
  2. Step 2: Convert to fraction form
    659.54/910.29 = 394.01/x
  3. Step 3: Cross multiply
    659.54x = 910.29 × 394.01
  4. Step 4: Simplify right side
    659.54x = 358,656.84
  5. Step 5: Solve for x
    x = 358,656.84/659.54
  6. Step 6: Final answer
    x = 543.80

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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.