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Finding the Fourth Proportional to 660.09, 988.91 and 587.19

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Solution

The fourth proportional to 660.09, 988.91 and 587.19 is: 879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.09 : 988.91 = 587.19 : x
  2. Step 2: Convert to fraction form
    660.09/988.91 = 587.19/x
  3. Step 3: Cross multiply
    660.09x = 988.91 × 587.19
  4. Step 4: Simplify right side
    660.09x = 580,674.59
  5. Step 5: Solve for x
    x = 580,674.59/660.09
  6. Step 6: Final answer
    x = 879.70

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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.