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Finding the Fourth Proportional to 370.94, 511.98 and 308.71

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Solution

The fourth proportional to 370.94, 511.98 and 308.71 is: 426.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.94 : 511.98 = 308.71 : x
  2. Step 2: Convert to fraction form
    370.94/511.98 = 308.71/x
  3. Step 3: Cross multiply
    370.94x = 511.98 × 308.71
  4. Step 4: Simplify right side
    370.94x = 158,050.52
  5. Step 5: Solve for x
    x = 158,050.52/370.94
  6. Step 6: Final answer
    x = 426.08

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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.