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Finding the Fourth Proportional to 538.02, 805.23 and 407.70

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Solution

The fourth proportional to 538.02, 805.23 and 407.70 is: 610.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.02 : 805.23 = 407.70 : x
  2. Step 2: Convert to fraction form
    538.02/805.23 = 407.70/x
  3. Step 3: Cross multiply
    538.02x = 805.23 × 407.70
  4. Step 4: Simplify right side
    538.02x = 328,292.27
  5. Step 5: Solve for x
    x = 328,292.27/538.02
  6. Step 6: Final answer
    x = 610.19

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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.