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Finding the Fourth Proportional to 656.76, 906.39 and 377.09

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Solution

The fourth proportional to 656.76, 906.39 and 377.09 is: 520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.76 : 906.39 = 377.09 : x
  2. Step 2: Convert to fraction form
    656.76/906.39 = 377.09/x
  3. Step 3: Cross multiply
    656.76x = 906.39 × 377.09
  4. Step 4: Simplify right side
    656.76x = 341,786.07
  5. Step 5: Solve for x
    x = 341,786.07/656.76
  6. Step 6: Final answer
    x = 520.41

Related Problems

Find fourth proportional to 328.38, 453.20 and 188.54
Half scale
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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.