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Finding the Fourth Proportional to 602.21, 903.11 and 309.40

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Solution

The fourth proportional to 602.21, 903.11 and 309.40 is: 463.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.21 : 903.11 = 309.40 : x
  2. Step 2: Convert to fraction form
    602.21/903.11 = 309.40/x
  3. Step 3: Cross multiply
    602.21x = 903.11 × 309.40
  4. Step 4: Simplify right side
    602.21x = 279,416.17
  5. Step 5: Solve for x
    x = 279,416.17/602.21
  6. Step 6: Final answer
    x = 463.98

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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.