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Finding the Fourth Proportional to 688.02, 949.43 and 377.50

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Solution

The fourth proportional to 688.02, 949.43 and 377.50 is: 520.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.02 : 949.43 = 377.50 : x
  2. Step 2: Convert to fraction form
    688.02/949.43 = 377.50/x
  3. Step 3: Cross multiply
    688.02x = 949.43 × 377.50
  4. Step 4: Simplify right side
    688.02x = 358,409.83
  5. Step 5: Solve for x
    x = 358,409.83/688.02
  6. Step 6: Final answer
    x = 520.93

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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.