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Finding the Fourth Proportional to 962.98, 1,328.81 and 543.36

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Solution

The fourth proportional to 962.98, 1,328.81 and 543.36 is: 749.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.98 : 1,328.81 = 543.36 : x
  2. Step 2: Convert to fraction form
    962.98/1,328.81 = 543.36/x
  3. Step 3: Cross multiply
    962.98x = 1,328.81 × 543.36
  4. Step 4: Simplify right side
    962.98x = 722,016.92
  5. Step 5: Solve for x
    x = 722,016.92/962.98
  6. Step 6: Final answer
    x = 749.77

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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.