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Finding the Fourth Proportional to 384.52, 530.34 and 356.68

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Solution

The fourth proportional to 384.52, 530.34 and 356.68 is: 491.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.52 : 530.34 = 356.68 : x
  2. Step 2: Convert to fraction form
    384.52/530.34 = 356.68/x
  3. Step 3: Cross multiply
    384.52x = 530.34 × 356.68
  4. Step 4: Simplify right side
    384.52x = 189,161.67
  5. Step 5: Solve for x
    x = 189,161.67/384.52
  6. Step 6: Final answer
    x = 491.94

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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.