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Finding the Fourth Proportional to 530.09, 731.81 and 355.53

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Solution

The fourth proportional to 530.09, 731.81 and 355.53 is: 490.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.09 : 731.81 = 355.53 : x
  2. Step 2: Convert to fraction form
    530.09/731.81 = 355.53/x
  3. Step 3: Cross multiply
    530.09x = 731.81 × 355.53
  4. Step 4: Simplify right side
    530.09x = 260,180.41
  5. Step 5: Solve for x
    x = 260,180.41/530.09
  6. Step 6: Final answer
    x = 490.82

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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.