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Finding the Fourth Proportional to 659.47, 909.73 and 612.56

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Solution

The fourth proportional to 659.47, 909.73 and 612.56 is: 845.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.47 : 909.73 = 612.56 : x
  2. Step 2: Convert to fraction form
    659.47/909.73 = 612.56/x
  3. Step 3: Cross multiply
    659.47x = 909.73 × 612.56
  4. Step 4: Simplify right side
    659.47x = 557,266.09
  5. Step 5: Solve for x
    x = 557,266.09/659.47
  6. Step 6: Final answer
    x = 845.03

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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.