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Finding the Fourth Proportional to 668.88, 920.86 and 581.52

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Solution

The fourth proportional to 668.88, 920.86 and 581.52 is: 800.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.88 : 920.86 = 581.52 : x
  2. Step 2: Convert to fraction form
    668.88/920.86 = 581.52/x
  3. Step 3: Cross multiply
    668.88x = 920.86 × 581.52
  4. Step 4: Simplify right side
    668.88x = 535,498.51
  5. Step 5: Solve for x
    x = 535,498.51/668.88
  6. Step 6: Final answer
    x = 800.59

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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.