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Finding the Fourth Proportional to 419.60, 624.51 and 416.27

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Solution

The fourth proportional to 419.60, 624.51 and 416.27 is: 619.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.60 : 624.51 = 416.27 : x
  2. Step 2: Convert to fraction form
    419.60/624.51 = 416.27/x
  3. Step 3: Cross multiply
    419.60x = 624.51 × 416.27
  4. Step 4: Simplify right side
    419.60x = 259,966.34
  5. Step 5: Solve for x
    x = 259,966.34/419.60
  6. Step 6: Final answer
    x = 619.55

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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.