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Finding the Fourth Proportional to 370.99, 556.35 and 208.45

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Solution

The fourth proportional to 370.99, 556.35 and 208.45 is: 312.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.99 : 556.35 = 208.45 : x
  2. Step 2: Convert to fraction form
    370.99/556.35 = 208.45/x
  3. Step 3: Cross multiply
    370.99x = 556.35 × 208.45
  4. Step 4: Simplify right side
    370.99x = 115,971.16
  5. Step 5: Solve for x
    x = 115,971.16/370.99
  6. Step 6: Final answer
    x = 312.60

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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.