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Finding the Fourth Proportional to 370.62, 511.15 and 305.01

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Solution

The fourth proportional to 370.62, 511.15 and 305.01 is: 420.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.62 : 511.15 = 305.01 : x
  2. Step 2: Convert to fraction form
    370.62/511.15 = 305.01/x
  3. Step 3: Cross multiply
    370.62x = 511.15 × 305.01
  4. Step 4: Simplify right side
    370.62x = 155,905.86
  5. Step 5: Solve for x
    x = 155,905.86/370.62
  6. Step 6: Final answer
    x = 420.66

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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.