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Finding the Fourth Proportional to 355.78, 530.64 and 333.72

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Solution

The fourth proportional to 355.78, 530.64 and 333.72 is: 497.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.78 : 530.64 = 333.72 : x
  2. Step 2: Convert to fraction form
    355.78/530.64 = 333.72/x
  3. Step 3: Cross multiply
    355.78x = 530.64 × 333.72
  4. Step 4: Simplify right side
    355.78x = 177,085.18
  5. Step 5: Solve for x
    x = 177,085.18/355.78
  6. Step 6: Final answer
    x = 497.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.