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Finding the Fourth Proportional to 377.34, 520.46 and 307.40

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Solution

The fourth proportional to 377.34, 520.46 and 307.40 is: 423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.34 : 520.46 = 307.40 : x
  2. Step 2: Convert to fraction form
    377.34/520.46 = 307.40/x
  3. Step 3: Cross multiply
    377.34x = 520.46 × 307.40
  4. Step 4: Simplify right side
    377.34x = 159,989.40
  5. Step 5: Solve for x
    x = 159,989.40/377.34
  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.