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Finding the Fourth Proportional to 656.21, 980.56 and 572.84

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Solution

The fourth proportional to 656.21, 980.56 and 572.84 is: 855.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.21 : 980.56 = 572.84 : x
  2. Step 2: Convert to fraction form
    656.21/980.56 = 572.84/x
  3. Step 3: Cross multiply
    656.21x = 980.56 × 572.84
  4. Step 4: Simplify right side
    656.21x = 561,703.48
  5. Step 5: Solve for x
    x = 561,703.48/656.21
  6. Step 6: Final answer
    x = 855.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.