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Finding the Fourth Proportional to 444.69, 613.53 and 287.28

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Solution

The fourth proportional to 444.69, 613.53 and 287.28 is: 396.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.69 : 613.53 = 287.28 : x
  2. Step 2: Convert to fraction form
    444.69/613.53 = 287.28/x
  3. Step 3: Cross multiply
    444.69x = 613.53 × 287.28
  4. Step 4: Simplify right side
    444.69x = 176,254.90
  5. Step 5: Solve for x
    x = 176,254.90/444.69
  6. Step 6: Final answer
    x = 396.35

Related Problems

Find fourth proportional to 222.35, 306.77 and 143.64
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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.