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Finding the Fourth Proportional to 530.08, 731.28 and 355.48

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Solution

The fourth proportional to 530.08, 731.28 and 355.48 is: 490.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.08 : 731.28 = 355.48 : x
  2. Step 2: Convert to fraction form
    530.08/731.28 = 355.48/x
  3. Step 3: Cross multiply
    530.08x = 731.28 × 355.48
  4. Step 4: Simplify right side
    530.08x = 259,954.92
  5. Step 5: Solve for x
    x = 259,954.92/530.08
  6. Step 6: Final answer
    x = 490.41

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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.