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Finding the Fourth Proportional to 384.43, 530.60 and 285.01

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Solution

The fourth proportional to 384.43, 530.60 and 285.01 is: 393.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.43 : 530.60 = 285.01 : x
  2. Step 2: Convert to fraction form
    384.43/530.60 = 285.01/x
  3. Step 3: Cross multiply
    384.43x = 530.60 × 285.01
  4. Step 4: Simplify right side
    384.43x = 151,226.31
  5. Step 5: Solve for x
    x = 151,226.31/384.43
  6. Step 6: Final answer
    x = 393.38

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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.