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Finding the Fourth Proportional to 656.56, 989.27 and 543.52

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Solution

The fourth proportional to 656.56, 989.27 and 543.52 is: 818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.56 : 989.27 = 543.52 : x
  2. Step 2: Convert to fraction form
    656.56/989.27 = 543.52/x
  3. Step 3: Cross multiply
    656.56x = 989.27 × 543.52
  4. Step 4: Simplify right side
    656.56x = 537,688.03
  5. Step 5: Solve for x
    x = 537,688.03/656.56
  6. Step 6: Final answer
    x = 818.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.