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Finding the Fourth Proportional to 445.69, 615.06 and 249.20

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Solution

The fourth proportional to 445.69, 615.06 and 249.20 is: 343.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.69 : 615.06 = 249.20 : x
  2. Step 2: Convert to fraction form
    445.69/615.06 = 249.20/x
  3. Step 3: Cross multiply
    445.69x = 615.06 × 249.20
  4. Step 4: Simplify right side
    445.69x = 153,274.96
  5. Step 5: Solve for x
    x = 153,274.96/445.69
  6. Step 6: Final answer
    x = 343.90

Related Problems

Find fourth proportional to 222.84, 307.53 and 124.60
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.