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Finding the Fourth Proportional to 355, 530 and 303.66

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Solution

The fourth proportional to 355, 530 and 303.66 is: 453.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    355 : 530 = 303.66 : x
  2. Step 2: Convert to fraction form
    355/530 = 303.66/x
  3. Step 3: Cross multiply
    355x = 530 × 303.66
  4. Step 4: Simplify right side
    355x = 160,939.80
  5. Step 5: Solve for x
    x = 160,939.80/355
  6. Step 6: Final answer
    x = 453.35

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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.