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Finding the Fourth Proportional to 419.12, 625.45 and 373.11

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Solution

The fourth proportional to 419.12, 625.45 and 373.11 is: 556.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.12 : 625.45 = 373.11 : x
  2. Step 2: Convert to fraction form
    419.12/625.45 = 373.11/x
  3. Step 3: Cross multiply
    419.12x = 625.45 × 373.11
  4. Step 4: Simplify right side
    419.12x = 233,358.02
  5. Step 5: Solve for x
    x = 233,358.02/419.12
  6. Step 6: Final answer
    x = 556.78

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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.