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Finding the Fourth Proportional to 660.63, 911.62 and 590.47

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Solution

The fourth proportional to 660.63, 911.62 and 590.47 is: 814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.63 : 911.62 = 590.47 : x
  2. Step 2: Convert to fraction form
    660.63/911.62 = 590.47/x
  3. Step 3: Cross multiply
    660.63x = 911.62 × 590.47
  4. Step 4: Simplify right side
    660.63x = 538,282.72
  5. Step 5: Solve for x
    x = 538,282.72/660.63
  6. Step 6: Final answer
    x = 814.80

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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.