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Finding the Fourth Proportional to 416.01, 621.12 and 391.44

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Solution

The fourth proportional to 416.01, 621.12 and 391.44 is: 584.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.01 : 621.12 = 391.44 : x
  2. Step 2: Convert to fraction form
    416.01/621.12 = 391.44/x
  3. Step 3: Cross multiply
    416.01x = 621.12 × 391.44
  4. Step 4: Simplify right side
    416.01x = 243,131.21
  5. Step 5: Solve for x
    x = 243,131.21/416.01
  6. Step 6: Final answer
    x = 584.44

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.