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Finding the Fourth Proportional to 550.76, 760.04 and 317.88

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Solution

The fourth proportional to 550.76, 760.04 and 317.88 is: 438.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.76 : 760.04 = 317.88 : x
  2. Step 2: Convert to fraction form
    550.76/760.04 = 317.88/x
  3. Step 3: Cross multiply
    550.76x = 760.04 × 317.88
  4. Step 4: Simplify right side
    550.76x = 241,601.52
  5. Step 5: Solve for x
    x = 241,601.52/550.76
  6. Step 6: Final answer
    x = 438.67

Related Problems

Find fourth proportional to 275.38, 380.02 and 158.94
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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.