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Finding the Fourth Proportional to 434.84, 651.39 and 399.41

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Solution

The fourth proportional to 434.84, 651.39 and 399.41 is: 598.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.84 : 651.39 = 399.41 : x
  2. Step 2: Convert to fraction form
    434.84/651.39 = 399.41/x
  3. Step 3: Cross multiply
    434.84x = 651.39 × 399.41
  4. Step 4: Simplify right side
    434.84x = 260,168.42
  5. Step 5: Solve for x
    x = 260,168.42/434.84
  6. Step 6: Final answer
    x = 598.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.