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Finding the Fourth Proportional to 628.73, 868.06 and 404.77

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Solution

The fourth proportional to 628.73, 868.06 and 404.77 is: 558.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.73 : 868.06 = 404.77 : x
  2. Step 2: Convert to fraction form
    628.73/868.06 = 404.77/x
  3. Step 3: Cross multiply
    628.73x = 868.06 × 404.77
  4. Step 4: Simplify right side
    628.73x = 351,361.46
  5. Step 5: Solve for x
    x = 351,361.46/628.73
  6. Step 6: Final answer
    x = 558.84

Related Problems

Find fourth proportional to 314.37, 434.03 and 202.38
Half scale
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Double scale
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Similar ratio
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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.