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Finding the Fourth Proportional to 659.47, 990.11 and 335.06

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Solution

The fourth proportional to 659.47, 990.11 and 335.06 is: 503.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.47 : 990.11 = 335.06 : x
  2. Step 2: Convert to fraction form
    659.47/990.11 = 335.06/x
  3. Step 3: Cross multiply
    659.47x = 990.11 × 335.06
  4. Step 4: Simplify right side
    659.47x = 331,746.26
  5. Step 5: Solve for x
    x = 331,746.26/659.47
  6. Step 6: Final answer
    x = 503.05

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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.