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Finding the Fourth Proportional to 1,176.56, 1,764.84 and 407

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Solution

The fourth proportional to 1,176.56, 1,764.84 and 407 is: 610.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.56 : 1,764.84 = 407 : x
  2. Step 2: Convert to fraction form
    1,176.56/1,764.84 = 407/x
  3. Step 3: Cross multiply
    1,176.56x = 1,764.84 × 407
  4. Step 4: Simplify right side
    1,176.56x = 718,289.88
  5. Step 5: Solve for x
    x = 718,289.88/1,176.56
  6. Step 6: Final answer
    x = 610.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.