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Finding the Fourth Proportional to 358.02, 493.05 and 307.87

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Solution

The fourth proportional to 358.02, 493.05 and 307.87 is: 423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.02 : 493.05 = 307.87 : x
  2. Step 2: Convert to fraction form
    358.02/493.05 = 307.87/x
  3. Step 3: Cross multiply
    358.02x = 493.05 × 307.87
  4. Step 4: Simplify right side
    358.02x = 151,795.23
  5. Step 5: Solve for x
    x = 151,795.23/358.02
  6. Step 6: Final answer
    x = 423.99

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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.