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Finding the Fourth Proportional to 710.75, 980.21 and 461.84

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Solution

The fourth proportional to 710.75, 980.21 and 461.84 is: 636.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.75 : 980.21 = 461.84 : x
  2. Step 2: Convert to fraction form
    710.75/980.21 = 461.84/x
  3. Step 3: Cross multiply
    710.75x = 980.21 × 461.84
  4. Step 4: Simplify right side
    710.75x = 452,692.98
  5. Step 5: Solve for x
    x = 452,692.98/710.75
  6. Step 6: Final answer
    x = 636.92

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Find fourth proportional to 355.38, 490.10 and 230.92
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Double scale
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1.5x scale

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.