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Finding the Fourth Proportional to 612.98, 919.46 and 247.67

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Solution

The fourth proportional to 612.98, 919.46 and 247.67 is: 371.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.98 : 919.46 = 247.67 : x
  2. Step 2: Convert to fraction form
    612.98/919.46 = 247.67/x
  3. Step 3: Cross multiply
    612.98x = 919.46 × 247.67
  4. Step 4: Simplify right side
    612.98x = 227,716.82
  5. Step 5: Solve for x
    x = 227,716.82/612.98
  6. Step 6: Final answer
    x = 371.49

Related Problems

Find fourth proportional to 306.49, 459.73 and 123.83
Half scale
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Double scale
Find fourth proportional to 613.98, 920.95 and 248.67
Similar ratio
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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.