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Finding the Fourth Proportional to 419.87, 626.98 and 342.99

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Solution

The fourth proportional to 419.87, 626.98 and 342.99 is: 512.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.87 : 626.98 = 342.99 : x
  2. Step 2: Convert to fraction form
    419.87/626.98 = 342.99/x
  3. Step 3: Cross multiply
    419.87x = 626.98 × 342.99
  4. Step 4: Simplify right side
    419.87x = 215,043.23
  5. Step 5: Solve for x
    x = 215,043.23/419.87
  6. Step 6: Final answer
    x = 512.17

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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.