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Finding the Fourth Proportional to 419.16, 625.95 and 414.64

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Solution

The fourth proportional to 419.16, 625.95 and 414.64 is: 619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.16 : 625.95 = 414.64 : x
  2. Step 2: Convert to fraction form
    419.16/625.95 = 414.64/x
  3. Step 3: Cross multiply
    419.16x = 625.95 × 414.64
  4. Step 4: Simplify right side
    419.16x = 259,543.91
  5. Step 5: Solve for x
    x = 259,543.91/419.16
  6. Step 6: Final answer
    x = 619.20

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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.