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Finding the Fourth Proportional to 897.76, 1,238.94 and 543.75

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Solution

The fourth proportional to 897.76, 1,238.94 and 543.75 is: 750.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.76 : 1,238.94 = 543.75 : x
  2. Step 2: Convert to fraction form
    897.76/1,238.94 = 543.75/x
  3. Step 3: Cross multiply
    897.76x = 1,238.94 × 543.75
  4. Step 4: Simplify right side
    897.76x = 673,669.17
  5. Step 5: Solve for x
    x = 673,669.17/897.76
  6. Step 6: Final answer
    x = 750.39

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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.