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Finding the Fourth Proportional to 538.40, 807.70 and 173.18

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Solution

The fourth proportional to 538.40, 807.70 and 173.18 is: 259.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.40 : 807.70 = 173.18 : x
  2. Step 2: Convert to fraction form
    538.40/807.70 = 173.18/x
  3. Step 3: Cross multiply
    538.40x = 807.70 × 173.18
  4. Step 4: Simplify right side
    538.40x = 139,877.49
  5. Step 5: Solve for x
    x = 139,877.49/538.40
  6. Step 6: Final answer
    x = 259.80

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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.