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Finding the Fourth Proportional to 935.88, 1,291.80 and 543.06

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Solution

The fourth proportional to 935.88, 1,291.80 and 543.06 is: 749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.88 : 1,291.80 = 543.06 : x
  2. Step 2: Convert to fraction form
    935.88/1,291.80 = 543.06/x
  3. Step 3: Cross multiply
    935.88x = 1,291.80 × 543.06
  4. Step 4: Simplify right side
    935.88x = 701,524.91
  5. Step 5: Solve for x
    x = 701,524.91/935.88
  6. Step 6: Final answer
    x = 749.59

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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.