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Finding the Fourth Proportional to 354.33, 530.58 and 256.83

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Solution

The fourth proportional to 354.33, 530.58 and 256.83 is: 384.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.33 : 530.58 = 256.83 : x
  2. Step 2: Convert to fraction form
    354.33/530.58 = 256.83/x
  3. Step 3: Cross multiply
    354.33x = 530.58 × 256.83
  4. Step 4: Simplify right side
    354.33x = 136,268.86
  5. Step 5: Solve for x
    x = 136,268.86/354.33
  6. Step 6: Final answer
    x = 384.58

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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.