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Finding the Fourth Proportional to 419.43, 578.89 and 242.51

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Solution

The fourth proportional to 419.43, 578.89 and 242.51 is: 334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.43 : 578.89 = 242.51 : x
  2. Step 2: Convert to fraction form
    419.43/578.89 = 242.51/x
  3. Step 3: Cross multiply
    419.43x = 578.89 × 242.51
  4. Step 4: Simplify right side
    419.43x = 140,384.02
  5. Step 5: Solve for x
    x = 140,384.02/419.43
  6. Step 6: Final answer
    x = 334.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.